Revert "Hope it is fine"

80 files changed, 7966 insertions, 2479 deletions

diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationError.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationError.cs
new file mode 100644
index 000000000..eda72fa6e
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationError.cs
@@ -0,0 +1,20 @@
+using Microsoft.CodeAnalysis;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public class CompilationError
+    {
+        public String File { get; set; }
+        public String Message { get; set; }
+        public DiagnosticSeverity Severity { get; set; }
+        public int Position { get; set; }
+        public int Line { get; set; }
+        public int Column { get; set; }
+        public int Length { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationResult.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationResult.cs
new file mode 100644
index 000000000..d3676acc0
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/CompilationResult.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Core.IO;
+
+namespace Tango.Scripting.Basic
+{
+    public class CompilationResult
+    {
+        public List<CompilationError> Errors { get; set; }
+        public TemporaryFolder TemporaryProjectPath { get; set; }
+        public Microsoft.CodeAnalysis.Scripting.Script Script { get; set; }
+
+        public CompilationResult()
+        {
+            Errors = new List<CompilationError>();
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/GlobalObject.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/GlobalObject.cs
new file mode 100644
index 000000000..c76fba8e2
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/GlobalObject.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public class GlobalObject<T> where T : IContext
+    {
+        public T GlobalContext { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/IContext.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/IContext.cs
new file mode 100644
index 000000000..d817c5d46
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/IContext.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public interface IContext
+    {
+        
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Project.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Project.cs
new file mode 100644
index 000000000..7500e404f
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Project.cs
@@ -0,0 +1,259 @@
+using Microsoft.CodeAnalysis.CSharp.Scripting;
+using Microsoft.CodeAnalysis.Scripting;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using Tango.Core;
+using Tango.Core.IO;
+using Tango.Scripting.Core;
+using System.IO;
+using Tango.Core.Helpers;
+
+namespace Tango.Scripting.Basic
+{
+    public class Project<T> : ExtendedObject where T : IContext
+    {
+        private object _compileLock = new object();
+
+        public String ID { get; set; }
+
+        private String _name;
+        public String Name
+        {
+            get { return _name; }
+            set { _name = value; RaisePropertyChangedAuto(); }
+        }
+
+        private String _description;
+        public String Description
+        {
+            get { return _description; }
+            set { _description = value; RaisePropertyChangedAuto(); }
+        }
+
+        private bool _isRunning;
+        [JsonIgnore]
+        public bool IsRunning
+        {
+            get { return _isRunning; }
+            set { _isRunning = value; RaisePropertyChangedAuto(); }
+        }
+
+        private bool _isCompiling;
+        [JsonIgnore]
+        public bool IsCompiling
+        {
+            get { return _isCompiling; }
+            set { _isCompiling = value; RaisePropertyChangedAuto(); }
+        }
+
+        public ApartmentState ApartmentState { get; set; }
+
+        public ObservableCollection<ReferenceAssembly> ReferenceAssemblies { get; set; }
+
+        public ObservableCollection<Script> Scripts { get; set; }
+
+        [JsonIgnore]
+        public ObservableCollection<IScriptSource> AdditionalScripts
+        {
+            get
+            {
+                return Scripts.Where(x => !x.IsEntryPoint).Cast<IScriptSource>().ToObservableCollection();
+            }
+        }
+
+        [JsonIgnore]
+        public List<ScriptBreakPoint> BreakPoints { get; set; }
+
+        public Project()
+        {
+            ID = Guid.NewGuid().ToString();
+
+            ApartmentState = ApartmentState.MTA;
+
+            ReferenceAssemblies = new ObservableCollection<ReferenceAssembly>();
+
+            Scripts = new ObservableCollection<Script>();
+            Scripts.CollectionChanged += (x, e) => { RaisePropertyChanged(nameof(AdditionalScripts)); };
+
+            BreakPoints = new List<ScriptBreakPoint>();
+        }
+
+        public Task<CompilationResult> Compile()
+        {
+            return Task.Factory.StartNew<CompilationResult>(() =>
+            {
+                lock (_compileLock)
+                {
+                    try
+                    {
+                        IsCompiling = true;
+                        var result = new CompilationResult();
+                        var tempFolder = TemporaryManager.CreateFolder(Name + "_" + ID);
+                        result.TemporaryProjectPath = tempFolder;
+
+                        String mainScriptCode = String.Empty;
+
+                        foreach (var script in Scripts)
+                        {
+                            script.LoadCount = 0;
+                            script.LoadCharCount = 0;
+                            String code = script.Code;
+                            String codeFile = Path.Combine(tempFolder, script.Name);
+
+                            String loadingString = String.Empty;
+
+                            foreach (var file in Scripts.Where(x => !x.IsEntryPoint && script != x).Select(x => Path.Combine(tempFolder, x.Name)))
+                            {
+                                loadingString += $"#load \"{file}\"\n";
+                                script.LoadCount++;
+                            }
+
+                            script.LoadCharCount += loadingString.Length;
+
+                            code = loadingString + code;
+
+                            int debugLinesLength = 0;
+
+                            foreach (var breakPoint in BreakPoints.Where(x => x.Script == script).OrderBy(x => x.LineNumber))
+                            {
+                                var debugLine = $"context.BreakPoint(\"{script.Name}\",{breakPoint.LineNumber}";
+
+                                foreach (var symbol in breakPoint.ContextSymbols)
+                                {
+                                    debugLine += $",\"{symbol.Name}\",{symbol.Offset},{symbol.Length},{symbol.Name}";
+                                }
+
+                                debugLine += ");";
+
+                                StringBuilder builder = new StringBuilder(code);
+                                builder.Insert(breakPoint.LineStartOffset + loadingString.Length + debugLinesLength, debugLine);
+                                code = builder.ToString();
+
+                                debugLinesLength += debugLine.Length;
+                            }
+
+                            if (!script.IsEntryPoint)
+                            {
+                                File.WriteAllText(codeFile, code);
+                            }
+                            else
+                            {
+                                code += Environment.NewLine + Environment.NewLine + "new Program().OnExecute(GlobalContext);";
+                                mainScriptCode = code;
+                            }
+                        }
+
+                        var scriptOptions = ScriptOptions.Default.WithReferences(LoadReferenceAssemblies()).WithEmitDebugInformation(true);
+
+                        var s = CSharpScript.Create<object>(mainScriptCode, scriptOptions, typeof(GlobalObject<T>));
+
+                        result.Script = s;
+
+                        var compileResults = s.Compile();
+
+                        GC.Collect();
+
+                        foreach (var error in compileResults.Where(x => x.Severity == Microsoft.CodeAnalysis.DiagnosticSeverity.Error))
+                        {
+                            CompilationError cError = new CompilationError();
+                            cError.File = System.IO.Path.GetFileName(error.Location.SourceTree.FilePath);
+                            if (cError.File == String.Empty)
+                            {
+                                cError.File = Scripts.Single(x => x.IsEntryPoint).Name;
+                            }
+                            Script errorScript = Scripts.Single(x => x.Name == cError.File);
+                            cError.Message = error.GetMessage();
+                            cError.Severity = error.Severity;
+                            cError.Position = error.Location.SourceSpan.Start - (errorScript != null ? errorScript.LoadCharCount : 0);
+                            var line = error.Location.GetMappedLineSpan();
+                            cError.Line = line.StartLinePosition.Line + 1 - (errorScript != null ? errorScript.LoadCount : 0);
+                            cError.Column = line.StartLinePosition.Character + 1;
+                            cError.Length = line.EndLinePosition.Character - line.StartLinePosition.Character;
+                            result.Errors.Add(cError);
+                        }
+
+                        return result;
+                    }
+                    catch (Exception)
+                    {
+                        throw;
+                    }
+                    finally
+                    {
+                        IsCompiling = false;
+                    }
+                }
+            });
+        }
+
+        public async Task<ProjectSession<T>> Run(T context)
+        {
+            IsRunning = true;
+            var result = await Compile();
+
+            if (result.Errors.Count > 0)
+            {
+                throw new InvalidOperationException($"Cannot run project with the following compilation errors:\n{String.Join(Environment.NewLine, result.Errors.Select(x => x.Message))}");
+            }
+
+            Thread scriptThread = null;
+            ProjectSession<T> session = null;
+
+            session = new ProjectSession<T>(this, () =>
+            {
+                scriptThread.Abort();
+            });
+
+            scriptThread = new Thread(() =>
+            {
+                try
+                {
+                    var runResult = result.Script.RunAsync(globals: new GlobalObject<T>() { GlobalContext = context }).Result;
+                    IsRunning = false;
+                    session.Completed(runResult.ReturnValue);
+                }
+                catch (ThreadAbortException)
+                {
+
+                }
+                catch (Exception ex)
+                {
+                    session.Failed(ex.InnerException);
+                }
+                finally
+                {
+                    BreakPoints.Clear();
+                    GC.Collect();
+                    IsRunning = false;
+                }
+            });
+
+            scriptThread.SetApartmentState(ApartmentState);
+            scriptThread.IsBackground = true;
+            scriptThread.Start();
+
+            return session;
+        }
+
+        public List<Assembly> LoadReferenceAssemblies()
+        {
+            List<Assembly> loadedAssemblies = new List<Assembly>();
+
+            foreach (var asm in ReferenceAssemblies)
+            {
+                loadedAssemblies.Add(asm.Load());
+            }
+
+            return loadedAssemblies;
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSession.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSession.cs
new file mode 100644
index 000000000..6bd3d44b9
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSession.cs
@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public class ProjectSession<T> where T : IContext
+    {
+        private Action _abortAction;
+        private TaskCompletionSource<object> _completion;
+
+        public event EventHandler<ProjectSessionStateChangedEventArgs> StateChanged;
+
+        public ProjectSessionState State { get; set; }
+
+        public Project<T> Project { get; set; }
+
+        public ProjectSession(Project<T> project, Action abortAction)
+        {
+            _completion = new TaskCompletionSource<object>();
+            Project = project;
+            _abortAction = abortAction;
+        }
+
+        public void Abort()
+        {
+            _abortAction();
+            State = ProjectSessionState.Aborted;
+            _completion.SetException(new OperationCanceledException("Project execution aborted."));
+            RaiseStateChanged();
+        }
+
+        internal void Failed(Exception ex)
+        {
+            State = ProjectSessionState.Failed;
+            _completion.SetException(ex);
+            RaiseStateChanged(null, ex);
+        }
+
+        internal void Completed(object returnValue)
+        {
+            State = ProjectSessionState.Completed;
+            _completion.SetResult(returnValue);
+            RaiseStateChanged(returnValue, null);
+        }
+
+        private void RaiseStateChanged(object returnValue = null, Exception ex = null)
+        {
+            StateChanged?.Invoke(this,
+                new ProjectSessionStateChangedEventArgs()
+                {
+                    ReturnValue = returnValue,
+                    State = State,
+                    Exception = ex
+                });
+        }
+
+        public Task<Object> WaitForCompletion()
+        {
+            return _completion.Task;
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionState.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionState.cs
new file mode 100644
index 000000000..e47eecb8c
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionState.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public enum ProjectSessionState
+    {
+        Running,
+        Completed,
+        Aborted,
+        Failed,
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionStateChangedEventArgs.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionStateChangedEventArgs.cs
new file mode 100644
index 000000000..53ea96cd6
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ProjectSessionStateChangedEventArgs.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Basic
+{
+    public class ProjectSessionStateChangedEventArgs : EventArgs
+    {
+        public Object ReturnValue { get; set; }
+
+        public ProjectSessionState State { get; set; }
+
+        public Exception Exception { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/AssemblyInfo.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/AssemblyInfo.cs
new file mode 100644
index 000000000..20a020e63
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/AssemblyInfo.cs
@@ -0,0 +1,55 @@
+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Tango.Scripting.Basic")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Tango.Scripting.Basic")]
+[assembly: AssemblyCopyright("Copyright ©  2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly:ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                             //(used if a resource is not found in the page,
+                             // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                      //(used if a resource is not found in the page,
+                                      // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.Designer.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.Designer.cs
new file mode 100644
index 000000000..97b6a82b6
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.Designer.cs
@@ -0,0 +1,73 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Tango.Scripting.Basic.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "15.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Tango.Scripting.Basic.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] template {
+            get {
+                object obj = ResourceManager.GetObject("template", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.resx b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.resx
new file mode 100644
index 000000000..37de48988
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Resources.resx
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="template" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\template.csx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+</root>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.Designer.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.Designer.cs
new file mode 100644
index 000000000..cb477c7a2
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.Designer.cs
@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Tango.Scripting.Basic.Properties
+{
+    
+    
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+        
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+        
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.settings b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.settings
new file mode 100644
index 000000000..033d7a5e9
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Properties/Settings.settings
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="uri:settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ReferenceAssembly.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ReferenceAssembly.cs
new file mode 100644
index 000000000..665bd7ab1
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/ReferenceAssembly.cs
@@ -0,0 +1,88 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Core.Helpers;
+
+namespace Tango.Scripting.Basic
+{
+    public class ReferenceAssembly
+    {
+        private static Dictionary<String, Assembly> _assembliesCache;
+
+        static ReferenceAssembly()
+        {
+            _assembliesCache = new Dictionary<string, Assembly>();
+        }
+
+        public String File { get; set; }
+
+        public Type HintType { get; set; }
+
+        [JsonIgnore]
+        public String Name
+        {
+            get { return Path.GetFileNameWithoutExtension(File); }
+        }
+
+        public static ReferenceAssembly FromType(Type type)
+        {
+            ReferenceAssembly reference = new ReferenceAssembly();
+            reference.HintType = type;
+            var assembly = type.Assembly;
+            reference.File = assembly.Location;
+            return reference;
+        }
+
+        public static ReferenceAssembly FromFile(String file)
+        {
+            return new ReferenceAssembly() { File = file };
+        }
+
+        public Assembly Load()
+        {
+            Assembly loaded = null;
+            if (!_assembliesCache.TryGetValue(Name, out loaded))
+            {
+                try
+                {
+                    if (HintType != null)
+                    {
+                        loaded = HintType.Assembly;
+                    }
+                    else
+                    {
+                        loaded = Assembly.LoadFrom(File);
+                    }
+
+                    _assembliesCache.Add(Name, loaded);
+                }
+                catch
+                {
+                    try
+                    {
+                        String dotNetPath = AssemblyHelper.GetAssemblyTargetFrameworkFolder(Assembly.GetExecutingAssembly());
+                        String dotNetAsm = Path.Combine(dotNetPath, Name + ".dll");
+                        loaded = Assembly.LoadFrom(dotNetAsm);
+                        _assembliesCache.Add(Name, loaded);
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new FileNotFoundException($"Could not load assembly '{Name}'. File not found.", ex);
+                    }
+                }
+            }
+
+            return loaded;
+        }
+
+        public override string ToString()
+        {
+            return Name;
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Resources/template.csx b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Resources/template.csx
new file mode 100644
index 000000000..307e1e483
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Resources/template.csx
@@ -0,0 +1,16 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Tango.Scripting.Basic;
+
+public class MainScript
+{
+    public object OnExecute(IContext context)
+    {
+        return new
+        {
+            Item1 = "1",
+            Item2 = "2"
+        };
+    }
+}
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Script.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Script.cs
new file mode 100644
index 000000000..c465292cb
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Script.cs
@@ -0,0 +1,80 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Core;
+using Tango.Scripting.Core;
+
+namespace Tango.Scripting.Basic
+{
+    public class Script : ExtendedObject, IScriptSource
+    {
+        private String _name;
+        public String Name
+        {
+            get { return _name; }
+            set { _name = value; RaisePropertyChangedAuto(); }
+        }
+
+        public bool IsEntryPoint { get; set; }
+
+        private String _code;
+        public String Code
+        {
+            get { return _code; }
+            set
+            {
+                if (_code != null && _code != value)
+                {
+                    IsChanged = true;
+                }
+
+                _code = value;
+                RaisePropertyChangedAuto();
+            }
+        }
+
+        private bool _isChanged;
+        [JsonIgnore]
+        public bool IsChanged
+        {
+            get { return _isChanged; }
+            set { _isChanged = value; RaisePropertyChangedAuto(); }
+        }
+
+        private bool _isSelected;
+        [JsonIgnore]
+        public bool IsSelected
+        {
+            get { return _isSelected; }
+            set { _isSelected = value; RaisePropertyChangedAuto(); }
+        }
+
+        [JsonIgnore]
+        public int LoadCount { get; internal set; }
+        [JsonIgnore]
+        public int LoadCharCount { get; set; }
+
+        public static Script New(String file)
+        {
+            return new Script()
+            {
+                Name = Path.GetFileName(file),
+                Code = System.IO.File.ReadAllText(file),
+            };
+        }
+
+        public static Script New(String name, String code, bool isEntryPoint = false)
+        {
+            return new Script()
+            {
+                Name = name,
+                Code = code,
+                IsEntryPoint = isEntryPoint,
+            };
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Tango.Scripting.Basic.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Tango.Scripting.Basic.csproj
new file mode 100644
index 000000000..be52ca57a
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Tango.Scripting.Basic.csproj
@@ -0,0 +1,185 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{2B29A699-1D65-463A-8250-A2CE81D019C9}</ProjectGuid>
+    <OutputType>library</OutputType>
+    <RootNamespace>Tango.Scripting.Basic</RootNamespace>
+    <AssemblyName>Tango.Scripting.Basic</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <WarningLevel>4</WarningLevel>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.CodeAnalysis, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Common.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.CSharp, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.CSharp.Scripting, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.Scripting.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.Scripting.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.Scripting, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Scripting.Common.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.Scripting.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.AppContext, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.AppContext.4.3.0\lib\net46\System.AppContext.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Collections.Immutable, Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Collections.Immutable.1.3.1\lib\portable-net45+win8+wp8+wpa81\System.Collections.Immutable.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ComponentModel.Composition" />
+    <Reference Include="System.Console, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Console.4.3.0\lib\net46\System.Console.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Data" />
+    <Reference Include="System.Diagnostics.FileVersionInfo, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Diagnostics.FileVersionInfo.4.3.0\lib\net46\System.Diagnostics.FileVersionInfo.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Diagnostics.StackTrace, Version=4.0.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Diagnostics.StackTrace.4.3.0\lib\net46\System.Diagnostics.StackTrace.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.Compression, Version=4.1.2.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.Compression.4.3.0\lib\net46\System.IO.Compression.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.FileSystem, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.FileSystem.4.3.0\lib\net46\System.IO.FileSystem.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.FileSystem.Primitives, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.FileSystem.Primitives.4.3.0\lib\net46\System.IO.FileSystem.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Reflection.Metadata, Version=1.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Reflection.Metadata.1.4.2\lib\portable-net45+win8\System.Reflection.Metadata.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Algorithms, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Algorithms.4.3.0\lib\net461\System.Security.Cryptography.Algorithms.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Encoding, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Encoding.4.3.0\lib\net46\System.Security.Cryptography.Encoding.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Primitives, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Primitives.4.3.0\lib\net46\System.Security.Cryptography.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.X509Certificates, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.X509Certificates.4.3.0\lib\net461\System.Security.Cryptography.X509Certificates.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Encoding.CodePages, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Text.Encoding.CodePages.4.3.0\lib\net46\System.Text.Encoding.CodePages.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Thread, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Threading.Thread.4.3.0\lib\net46\System.Threading.Thread.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ValueTuple, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.ValueTuple.4.3.0\lib\netstandard1.0\System.ValueTuple.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xaml">
+      <RequiredTargetFramework>4.0</RequiredTargetFramework>
+    </Reference>
+    <Reference Include="System.Xml.ReaderWriter, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.ReaderWriter.4.3.0\lib\net46\System.Xml.ReaderWriter.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XmlDocument, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XmlDocument.4.3.0\lib\net46\System.Xml.XmlDocument.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XPath, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XPath.4.3.0\lib\net46\System.Xml.XPath.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XPath.XDocument, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XPath.XDocument.4.3.0\lib\net46\System.Xml.XPath.XDocument.dll</HintPath>
+    </Reference>
+    <Reference Include="WindowsBase" />
+    <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
+  </ItemGroup>
+  <ItemGroup>
+    <Page Include="Themes\Generic.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="CompilationError.cs" />
+    <Compile Include="CompilationResult.cs" />
+    <Compile Include="GlobalObject.cs" />
+    <Compile Include="Project.cs" />
+    <Compile Include="ReferenceAssembly.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+    <Compile Include="Script.cs" />
+    <Compile Include="IContext.cs" />
+    <Compile Include="ProjectSession.cs" />
+    <Compile Include="ProjectSessionState.cs" />
+    <Compile Include="ProjectSessionStateChangedEventArgs.cs" />
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <None Include="app.config" />
+    <None Include="packages.config" />
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <None Include="Resources\template.csx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\Tango.Core\Tango.Core.csproj">
+      <Project>{a34ee0f0-649d-41c8-8489-b6f1cc6924ee}</Project>
+      <Name>Tango.Core</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Core\Tango.Scripting.Core.csproj">
+      <Project>{5812E1C6-ABAA-4066-94AC-971C27B4F46A}</Project>
+      <Name>Tango.Scripting.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.Analyzers.dll" />
+    <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.CSharp.Analyzers.dll" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Themes/Generic.xaml b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Themes/Generic.xaml
new file mode 100644
index 000000000..a6b1f858a
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/Themes/Generic.xaml
@@ -0,0 +1,6 @@
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="clr-namespace:Tango.Scripting.Basic">
+
+</ResourceDictionary>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/app.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/app.config
new file mode 100644
index 000000000..451526a2c
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/app.config
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-1.2.1.0" newVersion="1.2.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO.Compression" publicKeyToken="b77a5c561934e089" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.2.0" newVersion="4.1.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Security.Cryptography.Algorithms" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.0.0" newVersion="4.1.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO.FileSystem" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO.FileSystem.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Security.Cryptography.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Xml.XPath.XDocument" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Console" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Diagnostics.StackTrace" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="Microsoft.IdentityModel.Clients.ActiveDirectory" publicKeyToken="31bf3856ad364e35" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-5.0.5.0" newVersion="5.0.5.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/packages.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/packages.config
new file mode 100644
index 000000000..fd135245d
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Basic/packages.config
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.CodeAnalysis.Analyzers" version="1.1.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Common" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.CSharp" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.CSharp.Scripting" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Scripting" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Scripting.Common" version="2.4.0" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
+  <package id="System.AppContext" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections.Immutable" version="1.3.1" targetFramework="net461" />
+  <package id="System.Console" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.Debug" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.FileVersionInfo" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.StackTrace" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.Tools" version="4.3.0" targetFramework="net461" />
+  <package id="System.Dynamic.Runtime" version="4.3.0" targetFramework="net461" />
+  <package id="System.Globalization" version="4.3.0" targetFramework="net461" />
+  <package id="System.IO" version="4.3.0" targetFramework="net461" />
+  <package id="System.IO.Compression" version="4.3.0" targetFramework="net461" />
+  <package id="System.IO.FileSystem" version="4.3.0" targetFramework="net461" />
+  <package id="System.IO.FileSystem.Primitives" version="4.3.0" targetFramework="net461" />
+  <package id="System.Linq" version="4.3.0" targetFramework="net461" />
+  <package id="System.Linq.Expressions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection.Metadata" version="1.4.2" targetFramework="net461" />
+  <package id="System.Resources.ResourceManager" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Algorithms" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding.CodePages" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Tasks.Parallel" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Thread" version="4.3.0" targetFramework="net461" />
+  <package id="System.ValueTuple" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.ReaderWriter" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XDocument" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XmlDocument" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XPath" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XPath.XDocument" version="4.3.0" targetFramework="net461" />
+</packages>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/BreakPoint.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/BreakPoint.cs
new file mode 100644
index 000000000..e847ea03e
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/BreakPoint.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Core
+{
+    public class BreakPoint
+    {
+        public int LineNumber { get; set; }
+        public bool IsActive { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/IScriptSource.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/IScriptSource.cs
new file mode 100644
index 000000000..831d65935
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/IScriptSource.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Core
+{
+    public interface IScriptSource
+    {
+        String Code { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Properties/AssemblyInfo.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Properties/AssemblyInfo.cs
new file mode 100644
index 000000000..8b788d4cf
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Tango.Scripting.Core")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Tango.Scripting.Core")]
+[assembly: AssemblyCopyright("Copyright ©  2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("5812e1c6-abaa-4066-94ac-971c27b4f46a")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPoint.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPoint.cs
new file mode 100644
index 000000000..626c1abc6
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPoint.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Scripting.Core;
+
+namespace Tango.Scripting.Core
+{
+    public class ScriptBreakPoint
+    {
+        public IScriptSource Script { get; set; }
+        public int LineNumber { get; set; }
+        public int LineStartOffset { get; set; }
+        public int LineEndOffset { get; set; }
+        public List<ScriptBreakPointSymbol> ContextSymbols { get; set; }
+
+        public ScriptBreakPoint()
+        {
+            ContextSymbols = new List<ScriptBreakPointSymbol>();
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPointSymbol.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPointSymbol.cs
new file mode 100644
index 000000000..8da35fe55
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/ScriptBreakPointSymbol.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Core
+{
+    public class ScriptBreakPointSymbol
+    {
+        public String Name { get; set; }
+        public int Offset { get; set; }
+        public int Length { get; set; }
+        public Object SymbolObject { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Tango.Scripting.Core.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Tango.Scripting.Core.csproj
new file mode 100644
index 000000000..bb623a4fe
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Core/Tango.Scripting.Core.csproj
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{5812E1C6-ABAA-4066-94AC-971C27B4F46A}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Tango.Scripting.Core</RootNamespace>
+    <AssemblyName>Tango.Scripting.Core</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="BreakPoint.cs" />
+    <Compile Include="IScriptSource.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="ScriptBreakPoint.cs" />
+    <Compile Include="ScriptBreakPointSymbol.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/BreakPointSymbolPressedEventArgs.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/BreakPointSymbolPressedEventArgs.cs
new file mode 100644
index 000000000..1728bb565
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/BreakPointSymbolPressedEventArgs.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using Tango.Scripting.Core;
+
+namespace Tango.Scripting.Editors
+{
+    public class BreakPointSymbolPressedEventArgs : EventArgs
+    {
+        public ScriptBreakPointSymbol BreakPointSymbol { get; set; }
+        public Point Position { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedAssembly.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedAssembly.cs
new file mode 100644
index 000000000..b0178e63e
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedAssembly.cs
@@ -0,0 +1,21 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Scripting.Editors.Intellisense;
+
+namespace Tango.Scripting.Editors
+{
+    public class CachedAssembly
+    {
+        public String Name { get; set; }
+        public List<KnownType> KnownTypes { get; set; }
+
+        public CachedAssembly()
+        {
+            KnownTypes = new List<KnownType>();
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedUsing.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedUsing.cs
new file mode 100644
index 000000000..4a663bee9
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/CachedUsing.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Scripting.Editors.Intellisense;
+
+namespace Tango.Scripting.Editors
+{
+    public class CachedUsing
+    {
+        public String Namespace { get; set; }
+        public List<KnownType> KnownTypes { get; set; }
+
+        public CachedUsing()
+        {
+            KnownTypes = new List<KnownType>();
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/TextDocument.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/TextDocument.cs
index 84fc86f44..a95d07fcf 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/TextDocument.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/TextDocument.cs
@@ -14,823 +14,884 @@ using Tango.Scripting.Editors.Utils;
 
 namespace Tango.Scripting.Editors.Document
 {
-	/// <summary>
-	/// This class is the main class of the text model. Basically, it is a <see cref="System.Text.StringBuilder"/> with events.
-	/// </summary>
-	/// <remarks>
-	/// <b>Thread safety:</b>
-	/// <inheritdoc cref="VerifyAccess"/>
-	/// <para>However, there is a single method that is thread-safe: <see cref="CreateSnapshot()"/> (and its overloads).</para>
-	/// </remarks>
-	public sealed class TextDocument : ITextSource, INotifyPropertyChanged
-	{
-		#region Thread ownership
-		readonly object lockObject = new object();
-		Thread owner = Thread.CurrentThread;
-		
-		/// <summary>
-		/// Verifies that the current thread is the documents owner thread.
-		/// Throws an <see cref="InvalidOperationException"/> if the wrong thread accesses the TextDocument.
-		/// </summary>
-		/// <remarks>
-		/// <para>The TextDocument class is not thread-safe. A document instance expects to have a single owner thread
-		/// and will throw an <see cref="InvalidOperationException"/> when accessed from another thread.
-		/// It is possible to change the owner thread using the <see cref="SetOwnerThread"/> method.</para>
-		/// </remarks>
-		public void VerifyAccess()
-		{
-			if (Thread.CurrentThread != owner)
-				throw new InvalidOperationException("TextDocument can be accessed only from the thread that owns it.");
-		}
-		
-		/// <summary>
-		/// Transfers ownership of the document to another thread. This method can be used to load
-		/// a file into a TextDocument on a background thread and then transfer ownership to the UI thread
-		/// for displaying the document.
-		/// </summary>
-		/// <remarks>
-		/// <inheritdoc cref="VerifyAccess"/>
-		/// <para>
-		/// The owner can be set to null, which means that no thread can access the document. But, if the document
-		/// has no owner thread, any thread may take ownership by calling <see cref="SetOwnerThread"/>.
-		/// </para>
-		/// </remarks>
-		public void SetOwnerThread(Thread newOwner)
-		{
-			// We need to lock here to ensure that in the null owner case,
-			// only one thread succeeds in taking ownership.
-			lock (lockObject) {
-				if (owner != null) {
-					VerifyAccess();
-				}
-				owner = newOwner;
-			}
-		}
-		#endregion
-		
-		#region Fields + Constructor
-		readonly Rope<char> rope;
-		readonly DocumentLineTree lineTree;
-		readonly LineManager lineManager;
-		readonly TextAnchorTree anchorTree;
-		ChangeTrackingCheckpoint currentCheckpoint;
-		
-		/// <summary>
-		/// Create an empty text document.
-		/// </summary>
-		public TextDocument()
-			: this(string.Empty)
-		{
-		}
-		
-		/// <summary>
-		/// Create a new text document with the specified initial text.
-		/// </summary>
-		public TextDocument(IEnumerable<char> initialText)
-		{
-			if (initialText == null)
-				throw new ArgumentNullException("initialText");
-			rope = new Rope<char>(initialText);
-			lineTree = new DocumentLineTree(this);
-			lineManager = new LineManager(lineTree, this);
-			lineTrackers.CollectionChanged += delegate {
-				lineManager.UpdateListOfLineTrackers();
-			};
-			
-			anchorTree = new TextAnchorTree(this);
-			undoStack = new UndoStack();
-			FireChangeEvents();
-		}
-		
-		/// <summary>
-		/// Create a new text document with the specified initial text.
-		/// </summary>
-		public TextDocument(ITextSource initialText)
-			: this(GetTextFromTextSource(initialText))
-		{
-		}
-		
-		// gets the text from a text source, directly retrieving the underlying rope where possible
-		static IEnumerable<char> GetTextFromTextSource(ITextSource textSource)
-		{
-			if (textSource == null)
-				throw new ArgumentNullException("textSource");
-			
-			RopeTextSource rts = textSource as RopeTextSource;
-			if (rts != null)
-				return rts.GetRope();
-			
-			TextDocument doc = textSource as TextDocument;
-			if (doc != null)
-				return doc.rope;
-			
-			return textSource.Text;
-		}
-		#endregion
-		
-		#region Text
-		void ThrowIfRangeInvalid(int offset, int length)
-		{
-			if (offset < 0 || offset > rope.Length) {
-				throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
-			}
-			if (length < 0 || offset + length > rope.Length) {
-				throw new ArgumentOutOfRangeException("length", length, "0 <= length, offset(" + offset + ")+length <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
-			}
-		}
-		
-		/// <inheritdoc/>
-		public string GetText(int offset, int length)
-		{
-			VerifyAccess();
-			return rope.ToString(offset, length);
-		}
-		
-		/// <summary>
-		/// Retrieves the text for a portion of the document.
-		/// </summary>
-		public string GetText(ISegment segment)
-		{
-			if (segment == null)
-				throw new ArgumentNullException("segment");
-			return GetText(segment.Offset, segment.Length);
-		}
-		
-		int ITextSource.IndexOfAny(char[] anyOf, int startIndex, int count)
-		{
-			DebugVerifyAccess(); // frequently called (NewLineFinder), so must be fast in release builds
-			return rope.IndexOfAny(anyOf, startIndex, count);
-		}
-		
-		/// <inheritdoc/>
-		public char GetCharAt(int offset)
-		{
-			DebugVerifyAccess(); // frequently called, so must be fast in release builds
-			return rope[offset];
-		}
-		
-		WeakReference cachedText;
-		
-		/// <summary>
-		/// Gets/Sets the text of the whole document.
-		/// </summary>
-		public string Text {
-			get {
-				VerifyAccess();
-				string completeText = cachedText != null ? (cachedText.Target as string) : null;
-				if (completeText == null) {
-					completeText = rope.ToString();
-					cachedText = new WeakReference(completeText);
-				}
-				return completeText;
-			}
-			set {
-				VerifyAccess();
-				if (value == null)
-					throw new ArgumentNullException("value");
-				Replace(0, rope.Length, value);
-			}
-		}
-		
-		/// <inheritdoc/>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public event EventHandler TextChanged;
-		
-		/// <inheritdoc/>
-		public int TextLength {
-			get {
-				VerifyAccess();
-				return rope.Length;
-			}
-		}
-		
-		/// <summary>
-		/// Is raised when the TextLength property changes.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		[Obsolete("This event will be removed in a future version; use the PropertyChanged event instead")]
-		public event EventHandler TextLengthChanged;
-		
-		/// <summary>
-		/// Is raised when one of the properties <see cref="Text"/>, <see cref="TextLength"/>, <see cref="LineCount"/>,
-		/// <see cref="UndoStack"/> changes.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public event PropertyChangedEventHandler PropertyChanged;
-		
-		/// <summary>
-		/// Is raised before the document changes.
-		/// </summary>
-		/// <remarks>
-		/// <para>Here is the order in which events are raised during a document update:</para>
-		/// <list type="bullet">
-		/// <item><description><b><see cref="BeginUpdate">BeginUpdate()</see></b></description>
-		///   <list type="bullet">
-		///   <item><description>Start of change group (on undo stack)</description></item>
-		///   <item><description><see cref="UpdateStarted"/> event is raised</description></item>
-		///   </list></item>
-		/// <item><description><b><see cref="Insert(int,string)">Insert()</see> / <see cref="Remove(int,int)">Remove()</see> / <see cref="Replace(int,int,string)">Replace()</see></b></description>
-		///   <list type="bullet">
-		///   <item><description><see cref="Changing"/> event is raised</description></item>
-		///   <item><description>The document is changed</description></item>
-		///   <item><description><see cref="TextAnchor.Deleted">TextAnchor.Deleted</see> event is raised if anchors were
-		///     in the deleted text portion</description></item>
-		///   <item><description><see cref="Changed"/> event is raised</description></item>
-		///   </list></item>
-		/// <item><description><b><see cref="EndUpdate">EndUpdate()</see></b></description>
-		///   <list type="bullet">
-		///   <item><description><see cref="TextChanged"/> event is raised</description></item>
-		///   <item><description><see cref="PropertyChanged"/> event is raised (for the Text, TextLength, LineCount properties, in that order)</description></item>
-		///   <item><description>End of change group (on undo stack)</description></item>
-		///   <item><description><see cref="UpdateFinished"/> event is raised</description></item>
-		///   </list></item>
-		/// </list>
-		/// <para>
-		/// If the insert/remove/replace methods are called without a call to <c>BeginUpdate()</c>,
-		/// they will call <c>BeginUpdate()</c> and <c>EndUpdate()</c> to ensure no change happens outside of <c>UpdateStarted</c>/<c>UpdateFinished</c>.
-		/// </para><para>
-		/// There can be multiple document changes between the <c>BeginUpdate()</c> and <c>EndUpdate()</c> calls.
-		/// In this case, the events associated with EndUpdate will be raised only once after the whole document update is done.
-		/// </para><para>
-		/// The <see cref="UndoStack"/> listens to the <c>UpdateStarted</c> and <c>UpdateFinished</c> events to group all changes into a single undo step.
-		/// </para>
-		/// </remarks>
-		public event EventHandler<DocumentChangeEventArgs> Changing;
-		
-		/// <summary>
-		/// Is raised after the document has changed.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public event EventHandler<DocumentChangeEventArgs> Changed;
-		
-		/// <summary>
-		/// Creates a snapshot of the current text.
-		/// </summary>
-		/// <remarks>
-		/// <para>This method returns an immutable snapshot of the document, and may be safely called even when
-		/// the document's owner thread is concurrently modifying the document.
-		/// </para><para>
-		/// This special thread-safety guarantee is valid only for TextDocument.CreateSnapshot(), not necessarily for other
-		/// classes implementing ITextSource.CreateSnapshot().
-		/// </para><para>
-		/// </para>
-		/// </remarks>
-		public ITextSource CreateSnapshot()
-		{
-			lock (lockObject) {
-				return new RopeTextSource(rope.Clone());
-			}
-		}
-		
-		/// <summary>
-		/// Creates a snapshot of the current text.
-		/// Additionally, creates a checkpoint that allows tracking document changes.
-		/// </summary>
-		/// <remarks><inheritdoc cref="CreateSnapshot()"/><inheritdoc cref="ChangeTrackingCheckpoint"/></remarks>
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1021:AvoidOutParameters", Justification = "Need to return snapshot and checkpoint together to ensure thread-safety")]
-		public ITextSource CreateSnapshot(out ChangeTrackingCheckpoint checkpoint)
-		{
-			lock (lockObject) {
-				if (currentCheckpoint == null)
-					currentCheckpoint = new ChangeTrackingCheckpoint(lockObject);
-				checkpoint = currentCheckpoint;
-				return new RopeTextSource(rope.Clone());
-			}
-		}
-		
-		internal ChangeTrackingCheckpoint CreateChangeTrackingCheckpoint()
-		{
-			lock (lockObject) {
-				if (currentCheckpoint == null)
-					currentCheckpoint = new ChangeTrackingCheckpoint(lockObject);
-				return currentCheckpoint;
-			}
-		}
-		
-		/// <summary>
-		/// Creates a snapshot of a part of the current text.
-		/// </summary>
-		/// <remarks><inheritdoc cref="CreateSnapshot()"/></remarks>
-		public ITextSource CreateSnapshot(int offset, int length)
-		{
-			lock (lockObject) {
-				return new RopeTextSource(rope.GetRange(offset, length));
-			}
-		}
-		
-		/// <inheritdoc/>
-		public System.IO.TextReader CreateReader()
-		{
-			lock (lockObject) {
-				return new RopeTextReader(rope);
-			}
-		}
-		#endregion
-		
-		#region BeginUpdate / EndUpdate
-		int beginUpdateCount;
-		
-		/// <summary>
-		/// Gets if an update is running.
-		/// </summary>
-		/// <remarks><inheritdoc cref="BeginUpdate"/></remarks>
-		public bool IsInUpdate {
-			get {
-				VerifyAccess();
-				return beginUpdateCount > 0;
-			}
-		}
-		
-		/// <summary>
-		/// Immediately calls <see cref="BeginUpdate()"/>,
-		/// and returns an IDisposable that calls <see cref="EndUpdate()"/>.
-		/// </summary>
-		/// <remarks><inheritdoc cref="BeginUpdate"/></remarks>
-		public IDisposable RunUpdate()
-		{
-			BeginUpdate();
-			return new CallbackOnDispose(EndUpdate);
-		}
-		
-		/// <summary>
-		/// <para>Begins a group of document changes.</para>
-		/// <para>Some events are suspended until EndUpdate is called, and the <see cref="UndoStack"/> will
-		/// group all changes into a single action.</para>
-		/// <para>Calling BeginUpdate several times increments a counter, only after the appropriate number
-		/// of EndUpdate calls the events resume their work.</para>
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public void BeginUpdate()
-		{
-			VerifyAccess();
-			if (inDocumentChanging)
-				throw new InvalidOperationException("Cannot change document within another document change.");
-			beginUpdateCount++;
-			if (beginUpdateCount == 1) {
-				undoStack.StartUndoGroup();
-				if (UpdateStarted != null)
-					UpdateStarted(this, EventArgs.Empty);
-			}
-		}
-		
-		/// <summary>
-		/// Ends a group of document changes.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public void EndUpdate()
-		{
-			VerifyAccess();
-			if (inDocumentChanging)
-				throw new InvalidOperationException("Cannot end update within document change.");
-			if (beginUpdateCount == 0)
-				throw new InvalidOperationException("No update is active.");
-			if (beginUpdateCount == 1) {
-				// fire change events inside the change group - event handlers might add additional
-				// document changes to the change group
-				FireChangeEvents();
-				undoStack.EndUndoGroup();
-				beginUpdateCount = 0;
-				if (UpdateFinished != null)
-					UpdateFinished(this, EventArgs.Empty);
-			} else {
-				beginUpdateCount -= 1;
-			}
-		}
-		
-		/// <summary>
-		/// Occurs when a document change starts.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public event EventHandler UpdateStarted;
-		
-		/// <summary>
-		/// Occurs when a document change is finished.
-		/// </summary>
-		/// <remarks><inheritdoc cref="Changing"/></remarks>
-		public event EventHandler UpdateFinished;
-		#endregion
-		
-		#region Fire events after update
-		int oldTextLength;
-		int oldLineCount;
-		bool fireTextChanged;
-		
-		/// <summary>
-		/// Fires TextChanged, TextLengthChanged, LineCountChanged if required.
-		/// </summary>
-		internal void FireChangeEvents()
-		{
-			// it may be necessary to fire the event multiple times if the document is changed
-			// from inside the event handlers
-			while (fireTextChanged) {
-				fireTextChanged = false;
-				if (TextChanged != null)
-					TextChanged(this, EventArgs.Empty);
-				OnPropertyChanged("Text");
-				
-				int textLength = rope.Length;
-				if (textLength != oldTextLength) {
-					oldTextLength = textLength;
-					if (TextLengthChanged != null)
-						TextLengthChanged(this, EventArgs.Empty);
-					OnPropertyChanged("TextLength");
-				}
-				int lineCount = lineTree.LineCount;
-				if (lineCount != oldLineCount) {
-					oldLineCount = lineCount;
-					if (LineCountChanged != null)
-						LineCountChanged(this, EventArgs.Empty);
-					OnPropertyChanged("LineCount");
-				}
-			}
-		}
-		
-		void OnPropertyChanged(string propertyName)
-		{
-			if (PropertyChanged != null)
-				PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
-		}
-		#endregion
-		
-		#region Insert / Remove  / Replace
-		/// <summary>
-		/// Inserts text.
-		/// </summary>
-		public void Insert(int offset, string text)
-		{
-			Replace(offset, 0, text);
-		}
-		
-		/// <summary>
-		/// Removes text.
-		/// </summary>
-		public void Remove(ISegment segment)
-		{
-			Replace(segment, string.Empty);
-		}
-		
-		/// <summary>
-		/// Removes text.
-		/// </summary>
-		public void Remove(int offset, int length)
-		{
-			Replace(offset, length, string.Empty);
-		}
-		
-		internal bool inDocumentChanging;
-		
-		/// <summary>
-		/// Replaces text.
-		/// </summary>
-		public void Replace(ISegment segment, string text)
-		{
-			if (segment == null)
-				throw new ArgumentNullException("segment");
-			Replace(segment.Offset, segment.Length, text, null);
-		}
-		
-		/// <summary>
-		/// Replaces text.
-		/// </summary>
-		public void Replace(int offset, int length, string text)
-		{
-			Replace(offset, length, text, null);
-		}
-		
-		/// <summary>
-		/// Replaces text.
-		/// </summary>
-		/// <param name="offset">The starting offset of the text to be replaced.</param>
-		/// <param name="length">The length of the text to be replaced.</param>
-		/// <param name="text">The new text.</param>
-		/// <param name="offsetChangeMappingType">The offsetChangeMappingType determines how offsets inside the old text are mapped to the new text.
-		/// This affects how the anchors and segments inside the replaced region behave.</param>
-		public void Replace(int offset, int length, string text, OffsetChangeMappingType offsetChangeMappingType)
-		{
-			if (text == null)
-				throw new ArgumentNullException("text");
-			// Please see OffsetChangeMappingType XML comments for details on how these modes work.
-			switch (offsetChangeMappingType) {
-				case OffsetChangeMappingType.Normal:
-					Replace(offset, length, text, null);
-					break;
-				case OffsetChangeMappingType.KeepAnchorBeforeInsertion:
-					Replace(offset, length, text, OffsetChangeMap.FromSingleElement(
-						new OffsetChangeMapEntry(offset, length, text.Length, false, true)));
-					break;
-				case OffsetChangeMappingType.RemoveAndInsert:
-					if (length == 0 || text.Length == 0) {
-						// only insertion or only removal?
-						// OffsetChangeMappingType doesn't matter, just use Normal.
-						Replace(offset, length, text, null);
-					} else {
-						OffsetChangeMap map = new OffsetChangeMap(2);
-						map.Add(new OffsetChangeMapEntry(offset, length, 0));
-						map.Add(new OffsetChangeMapEntry(offset, 0, text.Length));
-						map.Freeze();
-						Replace(offset, length, text, map);
-					}
-					break;
-				case OffsetChangeMappingType.CharacterReplace:
-					if (length == 0 || text.Length == 0) {
-						// only insertion or only removal?
-						// OffsetChangeMappingType doesn't matter, just use Normal.
-						Replace(offset, length, text, null);
-					} else if (text.Length > length) {
-						// look at OffsetChangeMappingType.CharacterReplace XML comments on why we need to replace
-						// the last character
-						OffsetChangeMapEntry entry = new OffsetChangeMapEntry(offset + length - 1, 1, 1 + text.Length - length);
-						Replace(offset, length, text, OffsetChangeMap.FromSingleElement(entry));
-					} else if (text.Length < length) {
-						OffsetChangeMapEntry entry = new OffsetChangeMapEntry(offset + text.Length, length - text.Length, 0, true, false);
-						Replace(offset, length, text, OffsetChangeMap.FromSingleElement(entry));
-					} else {
-						Replace(offset, length, text, OffsetChangeMap.Empty);
-					}
-					break;
-				default:
-					throw new ArgumentOutOfRangeException("offsetChangeMappingType", offsetChangeMappingType, "Invalid enum value");
-			}
-		}
-		
-		/// <summary>
-		/// Replaces text.
-		/// </summary>
-		/// <param name="offset">The starting offset of the text to be replaced.</param>
-		/// <param name="length">The length of the text to be replaced.</param>
-		/// <param name="text">The new text.</param>
-		/// <param name="offsetChangeMap">The offsetChangeMap determines how offsets inside the old text are mapped to the new text.
-		/// This affects how the anchors and segments inside the replaced region behave.
-		/// If you pass null (the default when using one of the other overloads), the offsets are changed as
-		/// in OffsetChangeMappingType.Normal mode.
-		/// If you pass OffsetChangeMap.Empty, then everything will stay in its old place (OffsetChangeMappingType.CharacterReplace mode).
-		/// The offsetChangeMap must be a valid 'explanation' for the document change. See <see cref="OffsetChangeMap.IsValidForDocumentChange"/>.
-		/// Passing an OffsetChangeMap to the Replace method will automatically freeze it to ensure the thread safety of the resulting
-		/// DocumentChangeEventArgs instance.
-		/// </param>
-		public void Replace(int offset, int length, string text, OffsetChangeMap offsetChangeMap)
-		{
-			if (text == null)
-				throw new ArgumentNullException("text");
-			
-			if (offsetChangeMap != null)
-				offsetChangeMap.Freeze();
-			
-			// Ensure that all changes take place inside an update group.
-			// Will also take care of throwing an exception if inDocumentChanging is set.
-			BeginUpdate();
-			try {
-				// protect document change against corruption by other changes inside the event handlers
-				inDocumentChanging = true;
-				try {
-					// The range verification must wait until after the BeginUpdate() call because the document
-					// might be modified inside the UpdateStarted event.
-					ThrowIfRangeInvalid(offset, length);
-					
-					DoReplace(offset, length, text, offsetChangeMap);
-				} finally {
-					inDocumentChanging = false;
-				}
-			} finally {
-				EndUpdate();
-			}
-		}
-		
-		void DoReplace(int offset, int length, string newText, OffsetChangeMap offsetChangeMap)
-		{
-			if (length == 0 && newText.Length == 0)
-				return;
-			
-			// trying to replace a single character in 'Normal' mode?
-			// for single characters, 'CharacterReplace' mode is equivalent, but more performant
-			// (we don't have to touch the anchorTree at all in 'CharacterReplace' mode)
-			if (length == 1 && newText.Length == 1 && offsetChangeMap == null)
-				offsetChangeMap = OffsetChangeMap.Empty;
-			
-			string removedText = rope.ToString(offset, length);
-			DocumentChangeEventArgs args = new DocumentChangeEventArgs(offset, removedText, newText, offsetChangeMap);
-			
-			// fire DocumentChanging event
-			if (Changing != null)
-				Changing(this, args);
-			
-			undoStack.Push(this, args);
-			
-			cachedText = null; // reset cache of complete document text
-			fireTextChanged = true;
-			DelayedEvents delayedEvents = new DelayedEvents();
-			
-			lock (lockObject) {
-				// create linked list of checkpoints, if required
-				if (currentCheckpoint != null) {
-					currentCheckpoint = currentCheckpoint.Append(args);
-				}
-				
-				// now update the textBuffer and lineTree
-				if (offset == 0 && length == rope.Length) {
-					// optimize replacing the whole document
-					rope.Clear();
-					rope.InsertText(0, newText);
-					lineManager.Rebuild();
-				} else {
-					rope.RemoveRange(offset, length);
-					lineManager.Remove(offset, length);
-					#if DEBUG
-					lineTree.CheckProperties();
-					#endif
-					rope.InsertText(offset, newText);
-					lineManager.Insert(offset, newText);
-					#if DEBUG
-					lineTree.CheckProperties();
-					#endif
-				}
-			}
-			
-			// update text anchors
-			if (offsetChangeMap == null) {
-				anchorTree.HandleTextChange(args.CreateSingleChangeMapEntry(), delayedEvents);
-			} else {
-				foreach (OffsetChangeMapEntry entry in offsetChangeMap) {
-					anchorTree.HandleTextChange(entry, delayedEvents);
-				}
-			}
-			
-			// raise delayed events after our data structures are consistent again
-			delayedEvents.RaiseEvents();
-			
-			// fire DocumentChanged event
-			if (Changed != null)
-				Changed(this, args);
-		}
-		#endregion
-		
-		#region GetLineBy...
-		/// <summary>
-		/// Gets a read-only list of lines.
-		/// </summary>
-		/// <remarks><inheritdoc cref="DocumentLine"/></remarks>
-		public IList<DocumentLine> Lines {
-			get { return lineTree; }
-		}
-		
-		/// <summary>
-		/// Gets a line by the line number: O(log n)
-		/// </summary>
-		public DocumentLine GetLineByNumber(int number)
-		{
-			VerifyAccess();
-			if (number < 1 || number > lineTree.LineCount)
-				throw new ArgumentOutOfRangeException("number", number, "Value must be between 1 and " + lineTree.LineCount);
-			return lineTree.GetByNumber(number);
-		}
-		
-		/// <summary>
-		/// Gets a document lines by offset.
-		/// Runtime: O(log n)
-		/// </summary>
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1305:SpecifyIFormatProvider", MessageId = "System.Int32.ToString")]
-		public DocumentLine GetLineByOffset(int offset)
-		{
-			VerifyAccess();
-			if (offset < 0 || offset > rope.Length) {
-				throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString());
-			}
-			return lineTree.GetByOffset(offset);
-		}
-		#endregion
-		
-		/// <summary>
-		/// Gets the offset from a text location.
-		/// </summary>
-		/// <seealso cref="GetLocation"/>
-		public int GetOffset(TextLocation location)
-		{
-			return GetOffset(location.Line, location.Column);
-		}
-		
-		/// <summary>
-		/// Gets the offset from a text location.
-		/// </summary>
-		/// <seealso cref="GetLocation"/>
-		public int GetOffset(int line, int column)
-		{
-			DocumentLine docLine = GetLineByNumber(line);
-			if (column <= 0)
-				return docLine.Offset;
-			if (column > docLine.Length)
-				return docLine.EndOffset;
-			return docLine.Offset + column - 1;
-		}
-		
-		/// <summary>
-		/// Gets the location from an offset.
-		/// </summary>
-		/// <seealso cref="GetOffset(TextLocation)"/>
-		public TextLocation GetLocation(int offset)
-		{
-			DocumentLine line = GetLineByOffset(offset);
-			return new TextLocation(line.LineNumber, offset - line.Offset + 1);
-		}
-		
-		readonly ObservableCollection<ILineTracker> lineTrackers = new ObservableCollection<ILineTracker>();
-		
-		/// <summary>
-		/// Gets the list of <see cref="ILineTracker"/>s attached to this document.
-		/// You can add custom line trackers to this list.
-		/// </summary>
-		public IList<ILineTracker> LineTrackers {
-			get {
-				VerifyAccess();
-				return lineTrackers;
-			}
-		}
-		
-		UndoStack undoStack;
-		
-		/// <summary>
-		/// Gets the <see cref="UndoStack"/> of the document.
-		/// </summary>
-		/// <remarks>This property can also be used to set the undo stack, e.g. for sharing a common undo stack between multiple documents.</remarks>
-		public UndoStack UndoStack {
-			get { return undoStack; }
-			set {
-				if (value == null)
-					throw new ArgumentNullException();
-				if (value != undoStack) {
-					undoStack.ClearAll(); // first clear old undo stack, so that it can't be used to perform unexpected changes on this document
-					// ClearAll() will also throw an exception when it's not safe to replace the undo stack (e.g. update is currently in progress)
-					undoStack = value;
-					OnPropertyChanged("UndoStack");
-				}
-			}
-		}
-		
-		/// <summary>
-		/// Creates a new <see cref="TextAnchor"/> at the specified offset.
-		/// </summary>
-		/// <inheritdoc cref="TextAnchor" select="remarks|example"/>
-		public TextAnchor CreateAnchor(int offset)
-		{
-			VerifyAccess();
-			if (offset < 0 || offset > rope.Length) {
-				throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
-			}
-			return anchorTree.CreateAnchor(offset);
-		}
-		
-		#region LineCount
-		/// <summary>
-		/// Gets the total number of lines in the document.
-		/// Runtime: O(1).
-		/// </summary>
-		public int LineCount {
-			get {
-				VerifyAccess();
-				return lineTree.LineCount;
-			}
-		}
-		
-		/// <summary>
-		/// Is raised when the LineCount property changes.
-		/// </summary>
-		[Obsolete("This event will be removed in a future version; use the PropertyChanged event instead")]
-		public event EventHandler LineCountChanged;
-		#endregion
-		
-		#region Debugging
-		[Conditional("DEBUG")]
-		internal void DebugVerifyAccess()
-		{
-			VerifyAccess();
-		}
-		
-		/// <summary>
-		/// Gets the document lines tree in string form.
-		/// </summary>
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate")]
-		internal string GetLineTreeAsString()
-		{
-			#if DEBUG
-			return lineTree.GetTreeAsString();
-			#else
+    /// <summary>
+    /// This class is the main class of the text model. Basically, it is a <see cref="System.Text.StringBuilder"/> with events.
+    /// </summary>
+    /// <remarks>
+    /// <b>Thread safety:</b>
+    /// <inheritdoc cref="VerifyAccess"/>
+    /// <para>However, there is a single method that is thread-safe: <see cref="CreateSnapshot()"/> (and its overloads).</para>
+    /// </remarks>
+    public sealed class TextDocument : ITextSource, INotifyPropertyChanged
+    {
+        #region Thread ownership
+        readonly object lockObject = new object();
+        Thread owner = Thread.CurrentThread;
+
+        /// <summary>
+        /// Verifies that the current thread is the documents owner thread.
+        /// Throws an <see cref="InvalidOperationException"/> if the wrong thread accesses the TextDocument.
+        /// </summary>
+        /// <remarks>
+        /// <para>The TextDocument class is not thread-safe. A document instance expects to have a single owner thread
+        /// and will throw an <see cref="InvalidOperationException"/> when accessed from another thread.
+        /// It is possible to change the owner thread using the <see cref="SetOwnerThread"/> method.</para>
+        /// </remarks>
+        public void VerifyAccess()
+        {
+            if (Thread.CurrentThread != owner)
+                throw new InvalidOperationException("TextDocument can be accessed only from the thread that owns it.");
+        }
+
+        /// <summary>
+        /// Transfers ownership of the document to another thread. This method can be used to load
+        /// a file into a TextDocument on a background thread and then transfer ownership to the UI thread
+        /// for displaying the document.
+        /// </summary>
+        /// <remarks>
+        /// <inheritdoc cref="VerifyAccess"/>
+        /// <para>
+        /// The owner can be set to null, which means that no thread can access the document. But, if the document
+        /// has no owner thread, any thread may take ownership by calling <see cref="SetOwnerThread"/>.
+        /// </para>
+        /// </remarks>
+        public void SetOwnerThread(Thread newOwner)
+        {
+            // We need to lock here to ensure that in the null owner case,
+            // only one thread succeeds in taking ownership.
+            lock (lockObject)
+            {
+                if (owner != null)
+                {
+                    VerifyAccess();
+                }
+                owner = newOwner;
+            }
+        }
+        #endregion
+
+        #region Fields + Constructor
+        readonly Rope<char> rope;
+        readonly DocumentLineTree lineTree;
+        readonly LineManager lineManager;
+        readonly TextAnchorTree anchorTree;
+        ChangeTrackingCheckpoint currentCheckpoint;
+
+        /// <summary>
+        /// Create an empty text document.
+        /// </summary>
+        public TextDocument()
+            : this(string.Empty)
+        {
+        }
+
+        /// <summary>
+        /// Create a new text document with the specified initial text.
+        /// </summary>
+        public TextDocument(IEnumerable<char> initialText)
+        {
+            if (initialText == null)
+                throw new ArgumentNullException("initialText");
+            rope = new Rope<char>(initialText);
+            lineTree = new DocumentLineTree(this);
+            lineManager = new LineManager(lineTree, this);
+            lineTrackers.CollectionChanged += delegate
+            {
+                lineManager.UpdateListOfLineTrackers();
+            };
+
+            anchorTree = new TextAnchorTree(this);
+            undoStack = new UndoStack();
+            FireChangeEvents();
+        }
+
+        /// <summary>
+        /// Create a new text document with the specified initial text.
+        /// </summary>
+        public TextDocument(ITextSource initialText)
+            : this(GetTextFromTextSource(initialText))
+        {
+        }
+
+        // gets the text from a text source, directly retrieving the underlying rope where possible
+        static IEnumerable<char> GetTextFromTextSource(ITextSource textSource)
+        {
+            if (textSource == null)
+                throw new ArgumentNullException("textSource");
+
+            RopeTextSource rts = textSource as RopeTextSource;
+            if (rts != null)
+                return rts.GetRope();
+
+            TextDocument doc = textSource as TextDocument;
+            if (doc != null)
+                return doc.rope;
+
+            return textSource.Text;
+        }
+        #endregion
+
+        #region Text
+        void ThrowIfRangeInvalid(int offset, int length)
+        {
+            if (offset < 0 || offset > rope.Length)
+            {
+                throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
+            }
+            if (length < 0 || offset + length > rope.Length)
+            {
+                throw new ArgumentOutOfRangeException("length", length, "0 <= length, offset(" + offset + ")+length <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
+            }
+        }
+
+        /// <inheritdoc/>
+        public string GetText(int offset, int length)
+        {
+            VerifyAccess();
+            return rope.ToString(Math.Max(offset, 0), length);
+        }
+
+        /// <summary>
+        /// Retrieves the text for a portion of the document.
+        /// </summary>
+        public string GetText(ISegment segment)
+        {
+            if (segment == null)
+                throw new ArgumentNullException("segment");
+            return GetText(segment.Offset, segment.Length);
+        }
+
+        int ITextSource.IndexOfAny(char[] anyOf, int startIndex, int count)
+        {
+            DebugVerifyAccess(); // frequently called (NewLineFinder), so must be fast in release builds
+            return rope.IndexOfAny(anyOf, startIndex, count);
+        }
+
+        /// <inheritdoc/>
+        public char GetCharAt(int offset)
+        {
+            DebugVerifyAccess(); // frequently called, so must be fast in release builds
+            return rope[offset];
+        }
+
+        WeakReference cachedText;
+
+        /// <summary>
+        /// Gets/Sets the text of the whole document.
+        /// </summary>
+        public string Text
+        {
+            get
+            {
+                VerifyAccess();
+                string completeText = cachedText != null ? (cachedText.Target as string) : null;
+                if (completeText == null)
+                {
+                    completeText = rope.ToString();
+                    cachedText = new WeakReference(completeText);
+                }
+                return completeText;
+            }
+            set
+            {
+                VerifyAccess();
+                if (value == null)
+                    throw new ArgumentNullException("value");
+                Replace(0, rope.Length, value);
+            }
+        }
+
+        /// <inheritdoc/>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public event EventHandler TextChanged;
+
+        /// <inheritdoc/>
+        public int TextLength
+        {
+            get
+            {
+                VerifyAccess();
+                return rope.Length;
+            }
+        }
+
+        /// <summary>
+        /// Is raised when the TextLength property changes.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        [Obsolete("This event will be removed in a future version; use the PropertyChanged event instead")]
+        public event EventHandler TextLengthChanged;
+
+        /// <summary>
+        /// Is raised when one of the properties <see cref="Text"/>, <see cref="TextLength"/>, <see cref="LineCount"/>,
+        /// <see cref="UndoStack"/> changes.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        /// <summary>
+        /// Is raised before the document changes.
+        /// </summary>
+        /// <remarks>
+        /// <para>Here is the order in which events are raised during a document update:</para>
+        /// <list type="bullet">
+        /// <item><description><b><see cref="BeginUpdate">BeginUpdate()</see></b></description>
+        ///   <list type="bullet">
+        ///   <item><description>Start of change group (on undo stack)</description></item>
+        ///   <item><description><see cref="UpdateStarted"/> event is raised</description></item>
+        ///   </list></item>
+        /// <item><description><b><see cref="Insert(int,string)">Insert()</see> / <see cref="Remove(int,int)">Remove()</see> / <see cref="Replace(int,int,string)">Replace()</see></b></description>
+        ///   <list type="bullet">
+        ///   <item><description><see cref="Changing"/> event is raised</description></item>
+        ///   <item><description>The document is changed</description></item>
+        ///   <item><description><see cref="TextAnchor.Deleted">TextAnchor.Deleted</see> event is raised if anchors were
+        ///     in the deleted text portion</description></item>
+        ///   <item><description><see cref="Changed"/> event is raised</description></item>
+        ///   </list></item>
+        /// <item><description><b><see cref="EndUpdate">EndUpdate()</see></b></description>
+        ///   <list type="bullet">
+        ///   <item><description><see cref="TextChanged"/> event is raised</description></item>
+        ///   <item><description><see cref="PropertyChanged"/> event is raised (for the Text, TextLength, LineCount properties, in that order)</description></item>
+        ///   <item><description>End of change group (on undo stack)</description></item>
+        ///   <item><description><see cref="UpdateFinished"/> event is raised</description></item>
+        ///   </list></item>
+        /// </list>
+        /// <para>
+        /// If the insert/remove/replace methods are called without a call to <c>BeginUpdate()</c>,
+        /// they will call <c>BeginUpdate()</c> and <c>EndUpdate()</c> to ensure no change happens outside of <c>UpdateStarted</c>/<c>UpdateFinished</c>.
+        /// </para><para>
+        /// There can be multiple document changes between the <c>BeginUpdate()</c> and <c>EndUpdate()</c> calls.
+        /// In this case, the events associated with EndUpdate will be raised only once after the whole document update is done.
+        /// </para><para>
+        /// The <see cref="UndoStack"/> listens to the <c>UpdateStarted</c> and <c>UpdateFinished</c> events to group all changes into a single undo step.
+        /// </para>
+        /// </remarks>
+        public event EventHandler<DocumentChangeEventArgs> Changing;
+
+        /// <summary>
+        /// Is raised after the document has changed.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public event EventHandler<DocumentChangeEventArgs> Changed;
+
+        /// <summary>
+        /// Creates a snapshot of the current text.
+        /// </summary>
+        /// <remarks>
+        /// <para>This method returns an immutable snapshot of the document, and may be safely called even when
+        /// the document's owner thread is concurrently modifying the document.
+        /// </para><para>
+        /// This special thread-safety guarantee is valid only for TextDocument.CreateSnapshot(), not necessarily for other
+        /// classes implementing ITextSource.CreateSnapshot().
+        /// </para><para>
+        /// </para>
+        /// </remarks>
+        public ITextSource CreateSnapshot()
+        {
+            lock (lockObject)
+            {
+                return new RopeTextSource(rope.Clone());
+            }
+        }
+
+        /// <summary>
+        /// Creates a snapshot of the current text.
+        /// Additionally, creates a checkpoint that allows tracking document changes.
+        /// </summary>
+        /// <remarks><inheritdoc cref="CreateSnapshot()"/><inheritdoc cref="ChangeTrackingCheckpoint"/></remarks>
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1021:AvoidOutParameters", Justification = "Need to return snapshot and checkpoint together to ensure thread-safety")]
+        public ITextSource CreateSnapshot(out ChangeTrackingCheckpoint checkpoint)
+        {
+            lock (lockObject)
+            {
+                if (currentCheckpoint == null)
+                    currentCheckpoint = new ChangeTrackingCheckpoint(lockObject);
+                checkpoint = currentCheckpoint;
+                return new RopeTextSource(rope.Clone());
+            }
+        }
+
+        internal ChangeTrackingCheckpoint CreateChangeTrackingCheckpoint()
+        {
+            lock (lockObject)
+            {
+                if (currentCheckpoint == null)
+                    currentCheckpoint = new ChangeTrackingCheckpoint(lockObject);
+                return currentCheckpoint;
+            }
+        }
+
+        /// <summary>
+        /// Creates a snapshot of a part of the current text.
+        /// </summary>
+        /// <remarks><inheritdoc cref="CreateSnapshot()"/></remarks>
+        public ITextSource CreateSnapshot(int offset, int length)
+        {
+            lock (lockObject)
+            {
+                return new RopeTextSource(rope.GetRange(offset, length));
+            }
+        }
+
+        /// <inheritdoc/>
+        public System.IO.TextReader CreateReader()
+        {
+            lock (lockObject)
+            {
+                return new RopeTextReader(rope);
+            }
+        }
+        #endregion
+
+        #region BeginUpdate / EndUpdate
+        int beginUpdateCount;
+
+        /// <summary>
+        /// Gets if an update is running.
+        /// </summary>
+        /// <remarks><inheritdoc cref="BeginUpdate"/></remarks>
+        public bool IsInUpdate
+        {
+            get
+            {
+                VerifyAccess();
+                return beginUpdateCount > 0;
+            }
+        }
+
+        /// <summary>
+        /// Immediately calls <see cref="BeginUpdate()"/>,
+        /// and returns an IDisposable that calls <see cref="EndUpdate()"/>.
+        /// </summary>
+        /// <remarks><inheritdoc cref="BeginUpdate"/></remarks>
+        public IDisposable RunUpdate()
+        {
+            BeginUpdate();
+            return new CallbackOnDispose(EndUpdate);
+        }
+
+        /// <summary>
+        /// <para>Begins a group of document changes.</para>
+        /// <para>Some events are suspended until EndUpdate is called, and the <see cref="UndoStack"/> will
+        /// group all changes into a single action.</para>
+        /// <para>Calling BeginUpdate several times increments a counter, only after the appropriate number
+        /// of EndUpdate calls the events resume their work.</para>
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public void BeginUpdate()
+        {
+            VerifyAccess();
+            if (inDocumentChanging)
+                throw new InvalidOperationException("Cannot change document within another document change.");
+            beginUpdateCount++;
+            if (beginUpdateCount == 1)
+            {
+                undoStack.StartUndoGroup();
+                if (UpdateStarted != null)
+                    UpdateStarted(this, EventArgs.Empty);
+            }
+        }
+
+        /// <summary>
+        /// Ends a group of document changes.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public void EndUpdate()
+        {
+            VerifyAccess();
+            if (inDocumentChanging)
+                throw new InvalidOperationException("Cannot end update within document change.");
+            if (beginUpdateCount == 0)
+                throw new InvalidOperationException("No update is active.");
+            if (beginUpdateCount == 1)
+            {
+                // fire change events inside the change group - event handlers might add additional
+                // document changes to the change group
+                FireChangeEvents();
+                undoStack.EndUndoGroup();
+                beginUpdateCount = 0;
+                if (UpdateFinished != null)
+                    UpdateFinished(this, EventArgs.Empty);
+            }
+            else
+            {
+                beginUpdateCount -= 1;
+            }
+        }
+
+        /// <summary>
+        /// Occurs when a document change starts.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public event EventHandler UpdateStarted;
+
+        /// <summary>
+        /// Occurs when a document change is finished.
+        /// </summary>
+        /// <remarks><inheritdoc cref="Changing"/></remarks>
+        public event EventHandler UpdateFinished;
+        #endregion
+
+        #region Fire events after update
+        int oldTextLength;
+        int oldLineCount;
+        bool fireTextChanged;
+
+        /// <summary>
+        /// Fires TextChanged, TextLengthChanged, LineCountChanged if required.
+        /// </summary>
+        internal void FireChangeEvents()
+        {
+            // it may be necessary to fire the event multiple times if the document is changed
+            // from inside the event handlers
+            while (fireTextChanged)
+            {
+                fireTextChanged = false;
+                if (TextChanged != null)
+                    TextChanged(this, EventArgs.Empty);
+                OnPropertyChanged("Text");
+
+                int textLength = rope.Length;
+                if (textLength != oldTextLength)
+                {
+                    oldTextLength = textLength;
+                    if (TextLengthChanged != null)
+                        TextLengthChanged(this, EventArgs.Empty);
+                    OnPropertyChanged("TextLength");
+                }
+                int lineCount = lineTree.LineCount;
+                if (lineCount != oldLineCount)
+                {
+                    oldLineCount = lineCount;
+                    if (LineCountChanged != null)
+                        LineCountChanged(this, EventArgs.Empty);
+                    OnPropertyChanged("LineCount");
+                }
+            }
+        }
+
+        void OnPropertyChanged(string propertyName)
+        {
+            if (PropertyChanged != null)
+                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+        }
+        #endregion
+
+        #region Insert / Remove  / Replace
+        /// <summary>
+        /// Inserts text.
+        /// </summary>
+        public void Insert(int offset, string text)
+        {
+            Replace(offset, 0, text);
+        }
+
+        /// <summary>
+        /// Removes text.
+        /// </summary>
+        public void Remove(ISegment segment)
+        {
+            Replace(segment, string.Empty);
+        }
+
+        /// <summary>
+        /// Removes text.
+        /// </summary>
+        public void Remove(int offset, int length)
+        {
+            Replace(offset, length, string.Empty);
+        }
+
+        internal bool inDocumentChanging;
+
+        /// <summary>
+        /// Replaces text.
+        /// </summary>
+        public void Replace(ISegment segment, string text)
+        {
+            if (segment == null)
+                throw new ArgumentNullException("segment");
+            Replace(segment.Offset, segment.Length, text, null);
+        }
+
+        /// <summary>
+        /// Replaces text.
+        /// </summary>
+        public void Replace(int offset, int length, string text)
+        {
+            Replace(offset, length, text, null);
+        }
+
+        /// <summary>
+        /// Replaces text.
+        /// </summary>
+        /// <param name="offset">The starting offset of the text to be replaced.</param>
+        /// <param name="length">The length of the text to be replaced.</param>
+        /// <param name="text">The new text.</param>
+        /// <param name="offsetChangeMappingType">The offsetChangeMappingType determines how offsets inside the old text are mapped to the new text.
+        /// This affects how the anchors and segments inside the replaced region behave.</param>
+        public void Replace(int offset, int length, string text, OffsetChangeMappingType offsetChangeMappingType)
+        {
+            if (text == null)
+                throw new ArgumentNullException("text");
+            // Please see OffsetChangeMappingType XML comments for details on how these modes work.
+            switch (offsetChangeMappingType)
+            {
+                case OffsetChangeMappingType.Normal:
+                    Replace(offset, length, text, null);
+                    break;
+                case OffsetChangeMappingType.KeepAnchorBeforeInsertion:
+                    Replace(offset, length, text, OffsetChangeMap.FromSingleElement(
+                        new OffsetChangeMapEntry(offset, length, text.Length, false, true)));
+                    break;
+                case OffsetChangeMappingType.RemoveAndInsert:
+                    if (length == 0 || text.Length == 0)
+                    {
+                        // only insertion or only removal?
+                        // OffsetChangeMappingType doesn't matter, just use Normal.
+                        Replace(offset, length, text, null);
+                    }
+                    else
+                    {
+                        OffsetChangeMap map = new OffsetChangeMap(2);
+                        map.Add(new OffsetChangeMapEntry(offset, length, 0));
+                        map.Add(new OffsetChangeMapEntry(offset, 0, text.Length));
+                        map.Freeze();
+                        Replace(offset, length, text, map);
+                    }
+                    break;
+                case OffsetChangeMappingType.CharacterReplace:
+                    if (length == 0 || text.Length == 0)
+                    {
+                        // only insertion or only removal?
+                        // OffsetChangeMappingType doesn't matter, just use Normal.
+                        Replace(offset, length, text, null);
+                    }
+                    else if (text.Length > length)
+                    {
+                        // look at OffsetChangeMappingType.CharacterReplace XML comments on why we need to replace
+                        // the last character
+                        OffsetChangeMapEntry entry = new OffsetChangeMapEntry(offset + length - 1, 1, 1 + text.Length - length);
+                        Replace(offset, length, text, OffsetChangeMap.FromSingleElement(entry));
+                    }
+                    else if (text.Length < length)
+                    {
+                        OffsetChangeMapEntry entry = new OffsetChangeMapEntry(offset + text.Length, length - text.Length, 0, true, false);
+                        Replace(offset, length, text, OffsetChangeMap.FromSingleElement(entry));
+                    }
+                    else
+                    {
+                        Replace(offset, length, text, OffsetChangeMap.Empty);
+                    }
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException("offsetChangeMappingType", offsetChangeMappingType, "Invalid enum value");
+            }
+        }
+
+        /// <summary>
+        /// Replaces text.
+        /// </summary>
+        /// <param name="offset">The starting offset of the text to be replaced.</param>
+        /// <param name="length">The length of the text to be replaced.</param>
+        /// <param name="text">The new text.</param>
+        /// <param name="offsetChangeMap">The offsetChangeMap determines how offsets inside the old text are mapped to the new text.
+        /// This affects how the anchors and segments inside the replaced region behave.
+        /// If you pass null (the default when using one of the other overloads), the offsets are changed as
+        /// in OffsetChangeMappingType.Normal mode.
+        /// If you pass OffsetChangeMap.Empty, then everything will stay in its old place (OffsetChangeMappingType.CharacterReplace mode).
+        /// The offsetChangeMap must be a valid 'explanation' for the document change. See <see cref="OffsetChangeMap.IsValidForDocumentChange"/>.
+        /// Passing an OffsetChangeMap to the Replace method will automatically freeze it to ensure the thread safety of the resulting
+        /// DocumentChangeEventArgs instance.
+        /// </param>
+        public void Replace(int offset, int length, string text, OffsetChangeMap offsetChangeMap)
+        {
+            if (text == null)
+                throw new ArgumentNullException("text");
+
+            if (offsetChangeMap != null)
+                offsetChangeMap.Freeze();
+
+            // Ensure that all changes take place inside an update group.
+            // Will also take care of throwing an exception if inDocumentChanging is set.
+            BeginUpdate();
+            try
+            {
+                // protect document change against corruption by other changes inside the event handlers
+                inDocumentChanging = true;
+                try
+                {
+                    // The range verification must wait until after the BeginUpdate() call because the document
+                    // might be modified inside the UpdateStarted event.
+                    ThrowIfRangeInvalid(offset, length);
+
+                    DoReplace(offset, length, text, offsetChangeMap);
+                }
+                finally
+                {
+                    inDocumentChanging = false;
+                }
+            }
+            finally
+            {
+                EndUpdate();
+            }
+        }
+
+        void DoReplace(int offset, int length, string newText, OffsetChangeMap offsetChangeMap)
+        {
+            if (length == 0 && newText.Length == 0)
+                return;
+
+            // trying to replace a single character in 'Normal' mode?
+            // for single characters, 'CharacterReplace' mode is equivalent, but more performant
+            // (we don't have to touch the anchorTree at all in 'CharacterReplace' mode)
+            if (length == 1 && newText.Length == 1 && offsetChangeMap == null)
+                offsetChangeMap = OffsetChangeMap.Empty;
+
+            string removedText = rope.ToString(offset, length);
+            DocumentChangeEventArgs args = new DocumentChangeEventArgs(offset, removedText, newText, offsetChangeMap);
+
+            // fire DocumentChanging event
+            if (Changing != null)
+                Changing(this, args);
+
+            undoStack.Push(this, args);
+
+            cachedText = null; // reset cache of complete document text
+            fireTextChanged = true;
+            DelayedEvents delayedEvents = new DelayedEvents();
+
+            lock (lockObject)
+            {
+                // create linked list of checkpoints, if required
+                if (currentCheckpoint != null)
+                {
+                    currentCheckpoint = currentCheckpoint.Append(args);
+                }
+
+                // now update the textBuffer and lineTree
+                if (offset == 0 && length == rope.Length)
+                {
+                    // optimize replacing the whole document
+                    rope.Clear();
+                    rope.InsertText(0, newText);
+                    lineManager.Rebuild();
+                }
+                else
+                {
+                    rope.RemoveRange(offset, length);
+                    lineManager.Remove(offset, length);
+#if DEBUG
+                    lineTree.CheckProperties();
+#endif
+                    rope.InsertText(offset, newText);
+                    lineManager.Insert(offset, newText);
+#if DEBUG
+                    lineTree.CheckProperties();
+#endif
+                }
+            }
+
+            // update text anchors
+            if (offsetChangeMap == null)
+            {
+                anchorTree.HandleTextChange(args.CreateSingleChangeMapEntry(), delayedEvents);
+            }
+            else
+            {
+                foreach (OffsetChangeMapEntry entry in offsetChangeMap)
+                {
+                    anchorTree.HandleTextChange(entry, delayedEvents);
+                }
+            }
+
+            // raise delayed events after our data structures are consistent again
+            delayedEvents.RaiseEvents();
+
+            // fire DocumentChanged event
+            if (Changed != null)
+                Changed(this, args);
+        }
+        #endregion
+
+        #region GetLineBy...
+        /// <summary>
+        /// Gets a read-only list of lines.
+        /// </summary>
+        /// <remarks><inheritdoc cref="DocumentLine"/></remarks>
+        public IList<DocumentLine> Lines
+        {
+            get { return lineTree; }
+        }
+
+        /// <summary>
+        /// Gets a line by the line number: O(log n)
+        /// </summary>
+        public DocumentLine GetLineByNumber(int number)
+        {
+            VerifyAccess();
+            if (number < 1 || number > lineTree.LineCount)
+                throw new ArgumentOutOfRangeException("number", number, "Value must be between 1 and " + lineTree.LineCount);
+            return lineTree.GetByNumber(number);
+        }
+
+        /// <summary>
+        /// Gets a document lines by offset.
+        /// Runtime: O(log n)
+        /// </summary>
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1305:SpecifyIFormatProvider", MessageId = "System.Int32.ToString")]
+        public DocumentLine GetLineByOffset(int offset)
+        {
+            VerifyAccess();
+            if (offset < 0 || offset > rope.Length)
+            {
+                throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString());
+            }
+            return lineTree.GetByOffset(offset);
+        }
+        #endregion
+
+        /// <summary>
+        /// Gets the offset from a text location.
+        /// </summary>
+        /// <seealso cref="GetLocation"/>
+        public int GetOffset(TextLocation location)
+        {
+            return GetOffset(location.Line, location.Column);
+        }
+
+        /// <summary>
+        /// Gets the offset from a text location.
+        /// </summary>
+        /// <seealso cref="GetLocation"/>
+        public int GetOffset(int line, int column)
+        {
+            DocumentLine docLine = GetLineByNumber(line);
+            if (column <= 0)
+                return docLine.Offset;
+            if (column > docLine.Length)
+                return docLine.EndOffset;
+            return docLine.Offset + column - 1;
+        }
+
+        /// <summary>
+        /// Gets the location from an offset.
+        /// </summary>
+        /// <seealso cref="GetOffset(TextLocation)"/>
+        public TextLocation GetLocation(int offset)
+        {
+            DocumentLine line = GetLineByOffset(offset);
+            return new TextLocation(line.LineNumber, offset - line.Offset + 1);
+        }
+
+        readonly ObservableCollection<ILineTracker> lineTrackers = new ObservableCollection<ILineTracker>();
+
+        /// <summary>
+        /// Gets the list of <see cref="ILineTracker"/>s attached to this document.
+        /// You can add custom line trackers to this list.
+        /// </summary>
+        public IList<ILineTracker> LineTrackers
+        {
+            get
+            {
+                VerifyAccess();
+                return lineTrackers;
+            }
+        }
+
+        UndoStack undoStack;
+
+        /// <summary>
+        /// Gets the <see cref="UndoStack"/> of the document.
+        /// </summary>
+        /// <remarks>This property can also be used to set the undo stack, e.g. for sharing a common undo stack between multiple documents.</remarks>
+        public UndoStack UndoStack
+        {
+            get { return undoStack; }
+            set
+            {
+                if (value == null)
+                    throw new ArgumentNullException();
+                if (value != undoStack)
+                {
+                    undoStack.ClearAll(); // first clear old undo stack, so that it can't be used to perform unexpected changes on this document
+                                          // ClearAll() will also throw an exception when it's not safe to replace the undo stack (e.g. update is currently in progress)
+                    undoStack = value;
+                    OnPropertyChanged("UndoStack");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Creates a new <see cref="TextAnchor"/> at the specified offset.
+        /// </summary>
+        /// <inheritdoc cref="TextAnchor" select="remarks|example"/>
+        public TextAnchor CreateAnchor(int offset)
+        {
+            VerifyAccess();
+            if (offset < 0 || offset > rope.Length)
+            {
+                throw new ArgumentOutOfRangeException("offset", offset, "0 <= offset <= " + rope.Length.ToString(CultureInfo.InvariantCulture));
+            }
+            return anchorTree.CreateAnchor(offset);
+        }
+
+        #region LineCount
+        /// <summary>
+        /// Gets the total number of lines in the document.
+        /// Runtime: O(1).
+        /// </summary>
+        public int LineCount
+        {
+            get
+            {
+                VerifyAccess();
+                return lineTree.LineCount;
+            }
+        }
+
+        /// <summary>
+        /// Is raised when the LineCount property changes.
+        /// </summary>
+        [Obsolete("This event will be removed in a future version; use the PropertyChanged event instead")]
+        public event EventHandler LineCountChanged;
+        #endregion
+
+        #region Debugging
+        [Conditional("DEBUG")]
+        internal void DebugVerifyAccess()
+        {
+            VerifyAccess();
+        }
+
+        /// <summary>
+        /// Gets the document lines tree in string form.
+        /// </summary>
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate")]
+        internal string GetLineTreeAsString()
+        {
+#if DEBUG
+            return lineTree.GetTreeAsString();
+#else
 			return "Not available in release build.";
-			#endif
-		}
-		
-		/// <summary>
-		/// Gets the text anchor tree in string form.
-		/// </summary>
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate")]
-		internal string GetTextAnchorTreeAsString()
-		{
-			#if DEBUG
-			return anchorTree.GetTreeAsString();
-			#else
+#endif
+        }
+
+        /// <summary>
+        /// Gets the text anchor tree in string form.
+        /// </summary>
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate")]
+        internal string GetTextAnchorTreeAsString()
+        {
+#if DEBUG
+            return anchorTree.GetTreeAsString();
+#else
 			return "Not available in release build.";
-			#endif
-		}
-		#endregion
-	}
+#endif
+        }
+        #endregion
+    }
 }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoStack.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoStack.cs
index f0a759b23..86e1fa33e 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoStack.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoStack.cs
@@ -414,7 +414,7 @@ namespace Tango.Scripting.Editors.Document
 		/// </summary>
 		public void ClearAll()
 		{
-			ThrowIfUndoGroupOpen();
+			//ThrowIfUndoGroupOpen();
 			actionCountInUndoGroup = 0;
 			optionalActionCount = 0;
 			if (undostack.Count != 0) {
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Editing/BreakPointMargin.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Editing/BreakPointMargin.cs
new file mode 100644
index 000000000..e566e6aa9
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Editing/BreakPointMargin.cs
@@ -0,0 +1,285 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Media.TextFormatting;
+using Tango.Scripting.Core;
+using Tango.Scripting.Editors.Document;
+using Tango.Scripting.Editors.Rendering;
+using Tango.Scripting.Editors.Utils;
+
+namespace Tango.Scripting.Editors.Editing
+{
+    public class BreakPointMargin : AbstractMargin, IWeakEventListener
+    {
+        private TextArea textArea;
+        private int maxLineNumberLength = 1;
+        private BitmapSource _arrowBitmap;
+        private ScriptEditor _editor;
+
+        public ObservableCollection<BreakPoint> BreakPoints { get; set; }
+
+        public Brush Background
+        {
+            get { return (Brush)GetValue(BackgroundProperty); }
+            set { SetValue(BackgroundProperty, value); }
+        }
+        public static readonly DependencyProperty BackgroundProperty =
+            DependencyProperty.Register("Background", typeof(Brush), typeof(BreakPointMargin), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(50, 50, 50))));
+
+        public Brush Foreground
+        {
+            get { return (Brush)GetValue(ForegroundProperty); }
+            set { SetValue(ForegroundProperty, value); }
+        }
+        public static readonly DependencyProperty ForegroundProperty =
+            DependencyProperty.Register("Foreground", typeof(Brush), typeof(BreakPointMargin), new PropertyMetadata(Brushes.Red));
+
+        static BreakPointMargin()
+        {
+            DefaultStyleKeyProperty.OverrideMetadata(typeof(BreakPointMargin),
+                                                     new FrameworkPropertyMetadata(typeof(BreakPointMargin)));
+        }
+
+        public BreakPointMargin(ScriptEditor editor)
+        {
+            _editor = editor;
+            BreakPoints = new ObservableCollection<BreakPoint>();
+            BreakPoints.CollectionChanged += BreakPoints_CollectionChanged;
+            RenderOptions.SetEdgeMode(this, EdgeMode.Unspecified);
+
+            _arrowBitmap = new BitmapImage(new Uri($"pack://application:,,,/Tango.Scripting.Editors;component/Images/break_point_arrow.png", UriKind.Absolute));
+        }
+
+        private void BreakPoints_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
+        {
+            InvalidateVisual();
+        }
+
+        protected override Size MeasureOverride(Size availableSize)
+        {
+            return new Size(20, 0);
+        }
+
+        protected override void OnRender(DrawingContext drawingContext)
+        {
+            TextView textView = this.TextView;
+            Size renderSize = this.RenderSize;
+            if (textView != null && textView.VisualLinesValid)
+            {
+                drawingContext.DrawRectangle(Background, new Pen(Background, 1), new Rect(0, 0, ActualWidth, ActualHeight));
+
+                var foreground = Foreground;
+                foreach (VisualLine line in textView.VisualLines)
+                {
+                    int lineNumber = line.FirstDocumentLine.LineNumber;
+
+                    BreakPoint b = BreakPoints.FirstOrDefault(x => x.LineNumber == lineNumber);
+
+                    if (b != null)
+                    {
+                        double y = line.GetTextLineVisualYPosition(line.TextLines[0], VisualYPosition.TextTop);
+                        drawingContext.DrawEllipse(Foreground, new Pen(Brushes.Gainsboro, 1), new Point(10, y - textView.VerticalOffset + 8), 6, 6);
+
+                        if (b.IsActive)
+                        {
+                            drawingContext.DrawImage(_arrowBitmap, new Rect(6, y - textView.VerticalOffset + 2.5, 8.5, 10));
+                        }
+                    }
+                }
+            }
+        }
+
+        protected override void OnTextViewChanged(TextView oldTextView, TextView newTextView)
+        {
+            if (oldTextView != null)
+            {
+                oldTextView.VisualLinesChanged -= TextViewVisualLinesChanged;
+            }
+            base.OnTextViewChanged(oldTextView, newTextView);
+            if (newTextView != null)
+            {
+                newTextView.VisualLinesChanged += TextViewVisualLinesChanged;
+
+                // find the text area belonging to the new text view
+                textArea = newTextView.Services.GetService(typeof(TextArea)) as TextArea;
+            }
+            else
+            {
+                textArea = null;
+            }
+            InvalidateVisual();
+        }
+
+        protected override void OnDocumentChanged(TextDocument oldDocument, TextDocument newDocument)
+        {
+            if (oldDocument != null)
+            {
+                PropertyChangedEventManager.RemoveListener(oldDocument, this, "LineCount");
+            }
+            base.OnDocumentChanged(oldDocument, newDocument);
+            if (newDocument != null)
+            {
+                PropertyChangedEventManager.AddListener(newDocument, this, "LineCount");
+            }
+            OnDocumentLineCountChanged();
+        }
+
+        protected virtual bool ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
+        {
+            if (managerType == typeof(PropertyChangedEventManager))
+            {
+                OnDocumentLineCountChanged();
+                return true;
+            }
+            return false;
+        }
+
+        bool IWeakEventListener.ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
+        {
+            return ReceiveWeakEvent(managerType, sender, e);
+        }
+
+        private void OnDocumentLineCountChanged()
+        {
+            int documentLineCount = Document != null ? Document.LineCount : 1;
+            int newLength = documentLineCount.ToString(CultureInfo.CurrentCulture).Length;
+
+            foreach (var breakPoint in BreakPoints.ToList())
+            {
+                if (breakPoint.LineNumber > documentLineCount)
+                {
+                    BreakPoints.Remove(breakPoint);
+                }
+                else
+                {
+                    try
+                    {
+                        var line = Document.GetLineByNumber(breakPoint.LineNumber);
+                        if (line != null)
+                        {
+                            String lineText = Document.GetText(line.Offset, line.Length);
+                            if (!IsBreakPointValid(lineText))
+                            {
+                                BreakPoints.Remove(breakPoint);
+                            }
+                        }
+                    }
+                    catch { }
+                }
+            }
+
+            // The margin looks too small when there is only one digit, so always reserve space for
+            // at least two digits
+            if (newLength < 2)
+                newLength = 2;
+
+            if (newLength != maxLineNumberLength)
+            {
+                maxLineNumberLength = newLength;
+                InvalidateMeasure();
+            }
+        }
+
+        private void TextViewVisualLinesChanged(object sender, EventArgs e)
+        {
+            InvalidateVisual();
+        }
+
+        protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
+        {
+            // accept clicks even when clicking on the background
+            return new PointHitTestResult(this, hitTestParameters.HitPoint);
+        }
+
+        private VisualLine GetLineNumberByMousePosition(MouseEventArgs e)
+        {
+            Point pos = e.GetPosition(TextView);
+            pos.X = 0;
+            pos.Y += TextView.VerticalOffset;
+            VisualLine vl = TextView.GetVisualLineFromVisualTop(pos.Y);
+            return vl;
+        }
+
+        private bool IsBreakPointValid(String lineText)
+        {
+            if (lineText.EndsWith(";") && !lineText.StartsWith("using"))
+            {
+                return true;
+            }
+
+            return false;
+        }
+
+        protected override void OnPreviewMouseMove(MouseEventArgs e)
+        {
+            base.OnPreviewMouseMove(e);
+
+            if (_editor.DisableBreakPoints)
+            {
+                Cursor = Cursors.No;
+            }
+            else
+            {
+                Cursor = Cursors.Arrow;
+            }
+        }
+
+        protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
+        {
+            base.OnMouseLeftButtonDown(e);
+
+            if (_editor.DisableBreakPoints)
+            {
+                return;
+            }
+
+            try
+            {
+                if (!e.Handled && TextView != null && textArea != null)
+                {
+                    e.Handled = true;
+                    textArea.Focus();
+
+                    var visualLine = GetLineNumberByMousePosition(e);
+
+                    int? lineNumber = visualLine != null ? (int?)visualLine.FirstDocumentLine.LineNumber : null;
+
+                    if (lineNumber != null)
+                    {
+                        var breakPoint = BreakPoints.FirstOrDefault(x => x.LineNumber == lineNumber.Value);
+                        if (breakPoint != null)
+                        {
+                            BreakPoints.Remove(breakPoint);
+                        }
+                        else
+                        {
+                            var lineText = Document.GetText(visualLine.FirstDocumentLine.Offset, visualLine.FirstDocumentLine.Length).Trim();
+
+                            if (IsBreakPointValid(lineText))
+                            {
+                                BreakPoint newBreakPoint = new BreakPoint();
+                                newBreakPoint.LineNumber = lineNumber.Value;
+                                BreakPoints.Add(newBreakPoint);
+                            }
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine(ex);
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/ITextMarker.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/ITextMarker.cs
new file mode 100644
index 000000000..dcbf8388a
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/ITextMarker.cs
@@ -0,0 +1,169 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using System.Windows.Media;
+
+namespace Tango.Scripting.Editors
+{
+	/// <summary>
+	/// Represents a text marker.
+	/// </summary>
+	public interface ITextMarker
+	{
+		/// <summary>
+		/// Gets the start offset of the marked text region.
+		/// </summary>
+		int StartOffset { get; }
+		
+		/// <summary>
+		/// Gets the end offset of the marked text region.
+		/// </summary>
+		int EndOffset { get; }
+		
+		/// <summary>
+		/// Gets the length of the marked region.
+		/// </summary>
+		int Length { get; }
+		
+		/// <summary>
+		/// Deletes the text marker.
+		/// </summary>
+		void Delete();
+		
+		/// <summary>
+		/// Gets whether the text marker was deleted.
+		/// </summary>
+		bool IsDeleted { get; }
+		
+		/// <summary>
+		/// Event that occurs when the text marker is deleted.
+		/// </summary>
+		event EventHandler Deleted;
+		
+		/// <summary>
+		/// Gets/Sets the background color.
+		/// </summary>
+		Color? BackgroundColor { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets the foreground color.
+		/// </summary>
+		Color? ForegroundColor { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets the font weight.
+		/// </summary>
+		FontWeight? FontWeight { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets the font style.
+		/// </summary>
+		FontStyle? FontStyle { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets the type of the marker. Use TextMarkerType.None for normal markers.
+		/// </summary>
+		TextMarkerTypes MarkerTypes { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets the color of the marker.
+		/// </summary>
+		Color MarkerColor { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets an object with additional data for this text marker.
+		/// </summary>
+		object Tag { get; set; }
+		
+		/// <summary>
+		/// Gets/Sets an object that will be displayed as tooltip in the text editor.
+		/// </summary>
+		/// <remarks>Not supported in this sample!</remarks>
+		object ToolTip { get; set; }
+	}
+	
+	[Flags]
+	public enum TextMarkerTypes
+	{
+		/// <summary>
+		/// Use no marker
+		/// </summary>
+		None = 0x0000,
+		/// <summary>
+		/// Use squiggly underline marker
+		/// </summary>
+		SquigglyUnderline = 0x001,
+		/// <summary>
+		/// Normal underline.
+		/// </summary>
+		NormalUnderline = 0x002,
+		/// <summary>
+		/// Dotted underline.
+		/// </summary>
+		DottedUnderline = 0x004,
+		
+		/// <summary>
+		/// Horizontal line in the scroll bar.
+		/// </summary>
+		LineInScrollBar = 0x0100,
+		/// <summary>
+		/// Small triangle in the scroll bar, pointing to the right.
+		/// </summary>
+		ScrollBarRightTriangle = 0x0400,
+		/// <summary>
+		/// Small triangle in the scroll bar, pointing to the left.
+		/// </summary>
+		ScrollBarLeftTriangle = 0x0800,
+		/// <summary>
+		/// Small circle in the scroll bar.
+		/// </summary>
+		CircleInScrollBar = 0x1000
+	}
+	
+	public interface ITextMarkerService
+	{
+		/// <summary>
+		/// Creates a new text marker. The text marker will be invisible at first,
+		/// you need to set one of the Color properties to make it visible.
+		/// </summary>
+		ITextMarker Create(int startOffset, int length);
+		
+		/// <summary>
+		/// Gets the list of text markers.
+		/// </summary>
+		IEnumerable<ITextMarker> TextMarkers { get; }
+		
+		/// <summary>
+		/// Removes the specified text marker.
+		/// </summary>
+		void Remove(ITextMarker marker);
+		
+		/// <summary>
+		/// Removes all text markers that match the condition.
+		/// </summary>
+		void RemoveAll(Predicate<ITextMarker> predicate);
+		
+		/// <summary>
+		/// Finds all text markers at the specified offset.
+		/// </summary>
+		IEnumerable<ITextMarker> GetMarkersAtOffset(int offset);
+	}
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/TextMarkerService.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/TextMarkerService.cs
new file mode 100644
index 000000000..2bb3d8e03
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Errors/TextMarkerService.cs
@@ -0,0 +1,365 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Threading;
+using Tango.Scripting.Editors.Document;
+using Tango.Scripting.Editors.Rendering;
+
+namespace Tango.Scripting.Editors
+{
+	/// <summary>
+	/// Handles the text markers for a code editor.
+	/// </summary>
+	public sealed class TextMarkerService : DocumentColorizingTransformer, IBackgroundRenderer, ITextMarkerService, ITextViewConnect
+	{
+		TextSegmentCollection<TextMarker> markers;
+		TextDocument document;
+		
+		public TextMarkerService(TextDocument document)
+		{
+			if (document == null)
+				throw new ArgumentNullException("document");
+			this.document = document;
+			this.markers = new TextSegmentCollection<TextMarker>(document);
+		}
+		
+		#region ITextMarkerService
+		public ITextMarker Create(int startOffset, int length)
+		{
+			if (markers == null)
+				throw new InvalidOperationException("Cannot create a marker when not attached to a document");
+			
+			int textLength = document.TextLength;
+			if (startOffset < 0 || startOffset > textLength)
+				throw new ArgumentOutOfRangeException("startOffset", startOffset, "Value must be between 0 and " + textLength);
+			if (length < 0 || startOffset + length > textLength)
+				throw new ArgumentOutOfRangeException("length", length, "length must not be negative and startOffset+length must not be after the end of the document");
+			
+			TextMarker m = new TextMarker(this, startOffset, length);
+			markers.Add(m);
+			// no need to mark segment for redraw: the text marker is invisible until a property is set
+			return m;
+		}
+		
+		public IEnumerable<ITextMarker> GetMarkersAtOffset(int offset)
+		{
+			if (markers == null)
+				return Enumerable.Empty<ITextMarker>();
+			else
+				return markers.FindSegmentsContaining(offset);
+		}
+		
+		public IEnumerable<ITextMarker> TextMarkers {
+			get { return markers ?? Enumerable.Empty<ITextMarker>(); }
+		}
+		
+		public void RemoveAll(Predicate<ITextMarker> predicate)
+		{
+			if (predicate == null)
+				throw new ArgumentNullException("predicate");
+			if (markers != null) {
+				foreach (TextMarker m in markers.ToArray()) {
+					if (predicate(m))
+						Remove(m);
+				}
+			}
+		}
+		
+		public void Remove(ITextMarker marker)
+		{
+			if (marker == null)
+				throw new ArgumentNullException("marker");
+			TextMarker m = marker as TextMarker;
+			if (markers != null && markers.Remove(m)) {
+				Redraw(m);
+				m.OnDeleted();
+			}
+		}
+		
+		/// <summary>
+		/// Redraws the specified text segment.
+		/// </summary>
+		internal void Redraw(ISegment segment)
+		{
+			foreach (var view in textViews) {
+				view.Redraw(segment, DispatcherPriority.Normal);
+			}
+			if (RedrawRequested != null)
+				RedrawRequested(this, EventArgs.Empty);
+		}
+		
+		public event EventHandler RedrawRequested;
+		#endregion
+		
+		#region DocumentColorizingTransformer
+		protected override void ColorizeLine(DocumentLine line)
+		{
+			if (markers == null)
+				return;
+			int lineStart = line.Offset;
+			int lineEnd = lineStart + line.Length;
+			foreach (TextMarker marker in markers.FindOverlappingSegments(lineStart, line.Length)) {
+				Brush foregroundBrush = null;
+				if (marker.ForegroundColor != null) {
+					foregroundBrush = new SolidColorBrush(marker.ForegroundColor.Value);
+					foregroundBrush.Freeze();
+				}
+				ChangeLinePart(
+					Math.Max(marker.StartOffset, lineStart),
+					Math.Min(marker.EndOffset, lineEnd),
+					element => {
+						if (foregroundBrush != null) {
+							element.TextRunProperties.SetForegroundBrush(foregroundBrush);
+						}
+						Typeface tf = element.TextRunProperties.Typeface;
+						element.TextRunProperties.SetTypeface(new Typeface(
+							tf.FontFamily,
+							marker.FontStyle ?? tf.Style,
+							marker.FontWeight ?? tf.Weight,
+							tf.Stretch
+						));
+					}
+				);
+			}
+		}
+		#endregion
+		
+		#region IBackgroundRenderer
+		public KnownLayer Layer {
+			get {
+				// draw behind selection
+				return KnownLayer.Selection;
+			}
+		}
+		
+		public void Draw(TextView textView, DrawingContext drawingContext)
+		{
+			if (textView == null)
+				throw new ArgumentNullException("textView");
+			if (drawingContext == null)
+				throw new ArgumentNullException("drawingContext");
+			if (markers == null || !textView.VisualLinesValid)
+				return;
+			var visualLines = textView.VisualLines;
+			if (visualLines.Count == 0)
+				return;
+			int viewStart = visualLines.First().FirstDocumentLine.Offset;
+			int viewEnd = visualLines.Last().LastDocumentLine.EndOffset;
+			foreach (TextMarker marker in markers.FindOverlappingSegments(viewStart, viewEnd - viewStart)) {
+				if (marker.BackgroundColor != null) {
+					BackgroundGeometryBuilder geoBuilder = new BackgroundGeometryBuilder();
+					geoBuilder.AlignToWholePixels = true;
+					geoBuilder.CornerRadius = 3;
+					geoBuilder.AddSegment(textView, marker);
+					Geometry geometry = geoBuilder.CreateGeometry();
+					if (geometry != null) {
+						Color color = marker.BackgroundColor.Value;
+						SolidColorBrush brush = new SolidColorBrush(color);
+						brush.Freeze();
+						drawingContext.DrawGeometry(brush, null, geometry);
+					}
+				}
+				var underlineMarkerTypes = TextMarkerTypes.SquigglyUnderline | TextMarkerTypes.NormalUnderline | TextMarkerTypes.DottedUnderline;
+				if ((marker.MarkerTypes & underlineMarkerTypes) != 0) {
+					foreach (Rect r in BackgroundGeometryBuilder.GetRectsForSegment(textView, marker)) {
+						Point startPoint = r.BottomLeft;
+						Point endPoint = r.BottomRight;
+						
+						Brush usedBrush = new SolidColorBrush(marker.MarkerColor);
+						usedBrush.Freeze();
+						if ((marker.MarkerTypes & TextMarkerTypes.SquigglyUnderline) != 0) {
+							double offset = 2.5;
+							
+							int count = Math.Max((int)((endPoint.X - startPoint.X) / offset) + 1, 4);
+							
+							StreamGeometry geometry = new StreamGeometry();
+							
+							using (StreamGeometryContext ctx = geometry.Open()) {
+								ctx.BeginFigure(startPoint, false, false);
+								ctx.PolyLineTo(CreatePoints(startPoint, endPoint, offset, count).ToArray(), true, false);
+							}
+							
+							geometry.Freeze();
+							
+							Pen usedPen = new Pen(usedBrush, 1);
+							usedPen.Freeze();
+							drawingContext.DrawGeometry(Brushes.Transparent, usedPen, geometry);
+						}
+						if ((marker.MarkerTypes & TextMarkerTypes.NormalUnderline) != 0) {
+							Pen usedPen = new Pen(usedBrush, 1);
+							usedPen.Freeze();
+							drawingContext.DrawLine(usedPen, startPoint, endPoint);
+						}
+						if ((marker.MarkerTypes & TextMarkerTypes.DottedUnderline) != 0) {
+							Pen usedPen = new Pen(usedBrush, 1);
+							usedPen.DashStyle = DashStyles.Dot;
+							usedPen.Freeze();
+							drawingContext.DrawLine(usedPen, startPoint, endPoint);
+						}
+					}
+				}
+			}
+		}
+		
+		IEnumerable<Point> CreatePoints(Point start, Point end, double offset, int count)
+		{
+			for (int i = 0; i < count; i++)
+				yield return new Point(start.X + i * offset, start.Y - ((i + 1) % 2 == 0 ? offset : 0));
+		}
+		#endregion
+		
+		#region ITextViewConnect
+		readonly List<TextView> textViews = new List<TextView>();
+		
+		void ITextViewConnect.AddToTextView(TextView textView)
+		{
+			if (textView != null && !textViews.Contains(textView)) {
+				Debug.Assert(textView.Document == document);
+				textViews.Add(textView);
+			}
+		}
+		
+		void ITextViewConnect.RemoveFromTextView(TextView textView)
+		{
+			if (textView != null) {
+				Debug.Assert(textView.Document == document);
+				textViews.Remove(textView);
+			}
+		}
+		#endregion
+	}
+	
+	public sealed class TextMarker : TextSegment, ITextMarker
+	{
+		readonly TextMarkerService service;
+		
+		public TextMarker(TextMarkerService service, int startOffset, int length)
+		{
+			if (service == null)
+				throw new ArgumentNullException("service");
+			this.service = service;
+			this.StartOffset = startOffset;
+			this.Length = length;
+			this.markerTypes = TextMarkerTypes.None;
+		}
+		
+		public event EventHandler Deleted;
+		
+		public bool IsDeleted {
+			get { return !this.IsConnectedToCollection; }
+		}
+		
+		public void Delete()
+		{
+			service.Remove(this);
+		}
+		
+		internal void OnDeleted()
+		{
+			if (Deleted != null)
+				Deleted(this, EventArgs.Empty);
+		}
+		
+		void Redraw()
+		{
+			service.Redraw(this);
+		}
+		
+		Color? backgroundColor;
+		
+		public Color? BackgroundColor {
+			get { return backgroundColor; }
+			set {
+				if (backgroundColor != value) {
+					backgroundColor = value;
+					Redraw();
+				}
+			}
+		}
+		
+		Color? foregroundColor;
+		
+		public Color? ForegroundColor {
+			get { return foregroundColor; }
+			set {
+				if (foregroundColor != value) {
+					foregroundColor = value;
+					Redraw();
+				}
+			}
+		}
+		
+		FontWeight? fontWeight;
+		
+		public FontWeight? FontWeight {
+			get { return fontWeight; }
+			set {
+				if (fontWeight != value) {
+					fontWeight = value;
+					Redraw();
+				}
+			}
+		}
+		
+		FontStyle? fontStyle;
+		
+		public FontStyle? FontStyle {
+			get { return fontStyle; }
+			set {
+				if (fontStyle != value) {
+					fontStyle = value;
+					Redraw();
+				}
+			}
+		}
+		
+		public object Tag { get; set; }
+		
+		TextMarkerTypes markerTypes;
+		
+		public TextMarkerTypes MarkerTypes {
+			get { return markerTypes; }
+			set {
+				if (markerTypes != value) {
+					markerTypes = value;
+					Redraw();
+				}
+			}
+		}
+		
+		Color markerColor;
+		
+		public Color MarkerColor {
+			get { return markerColor; }
+			set {
+				if (markerColor != value) {
+					markerColor = value;
+					Redraw();
+				}
+			}
+		}
+		
+		public object ToolTip { get; set; }
+	}
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ExtensionMethods.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ExtensionMethods.cs
index 1605ff281..d112c6141 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ExtensionMethods.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ExtensionMethods.cs
@@ -22,7 +22,7 @@ namespace Tango.Scripting.Editors
             {
                 List<String> args = new List<string>();
 
-                foreach (var lGenericArgument in type.GetGenericTypeDefinition().GetGenericArguments())
+                foreach (var lGenericArgument in type.GetGenericArguments())
                 {
                     args.Add(lGenericArgument.Name);
                 }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/OffsetColorizer.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/OffsetColorizer.cs
index a05d1fc75..72c27f9a9 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/OffsetColorizer.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/OffsetColorizer.cs
@@ -30,7 +30,7 @@ namespace Tango.Scripting.Editors.Highlighting
             {
                 try
                 {
-                    ChangeLinePart(StartOffset, EndOffset, element => element.TextRunProperties.SetForegroundBrush(Brush));
+                    ChangeLinePart(StartOffset, EndOffset, element => element.TextRunProperties.SetBackgroundBrush(Brush));
                 }
                 catch { }
             }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/CSharp-Mode.xshd b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/CSharp-Mode.xshd
index 40f362e08..1f6139ff6 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/CSharp-Mode.xshd
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/CSharp-Mode.xshd
@@ -11,7 +11,7 @@
   <Color name="InterfaceTypes" foreground="#B5CE8A" exampleText="object o;" />
 	<Color name="MethodCall" foreground="Gainsboro"  exampleText="o.ToString();"/>
 	<Color name="NumberLiteral" foreground="#B5CE8A" exampleText="3.1415f"/>
-	<Color name="ThisOrBaseReference"  exampleText="this.Do(); base.Do();"/>
+	<Color name="ThisOrBaseReference" foreground="#3F8FD6"  exampleText="this.Do(); base.Do();"/>
 	<Color name="NullOrValueKeywords"  exampleText="if (value == null)"/>
 	<Color name="Keywords"  foreground="#3F8FD6" exampleText="if (a) {} else {}"/>
 	<Color name="GotoKeywords" foreground="#3F8FD6" exampleText="continue; return null;"/>
@@ -22,7 +22,7 @@
 	<Color name="OperatorKeywords"  foreground="Pink" exampleText="public static implicit operator..."/>
 	<Color name="ParameterModifiers"  foreground="DeepPink" exampleText="(ref int a, params int[] b)"/>
 	<Color name="Modifiers" foreground="#3F8FD6" exampleText="static readonly int a;"/>
-  <Color name="CustomKeywords" foreground="#FAFF00" />
+  <Color name="CustomKeywords" foreground="DarkGray" />
 	<Color name="Visibility"  foreground="#3F8FD6" exampleText="public override void ToString();"/>
 	<Color name="NamespaceKeywords"  foreground="#569CD6" exampleText="namespace A.B { using System; }"/>
 	<Color name="GetSetAddRemove" foreground="#3F8FD6" exampleText="int Prop { get; set; }"/>
@@ -47,26 +47,7 @@
 	
 	<!-- This is the main ruleset. -->
 	<RuleSet>
-		<Span color="Preprocessor">
-			<Begin>\#</Begin>
-			<RuleSet name="PreprocessorSet">
-				<Span> <!-- preprocessor directives that allows comments -->
-					<Begin >
-						(define|undef|if|elif|else|endif|line)\b
-					</Begin>
-					<RuleSet>
-						<Span color="Comment" ruleSet="CommentMarkerSet">
-							<Begin>//</Begin>
-						</Span>
-					</RuleSet>
-				</Span>
-				<Span> <!-- preprocessor directives that don't allow comments -->
-					<Begin >
-						(region|endregion|error|warning|pragma)\b
-					</Begin>
-				</Span>
-			</RuleSet>
-		</Span>
+	
 		
 		<!--<Span color="Comment">
 			<Begin color="XmlDoc/DocComment">///</Begin>
@@ -118,8 +99,7 @@
 		</Rule>
 
     <Keywords color="CustomKeywords">
-      <Word>include</Word>
-      <Word>import</Word>
+      <Word>#load</Word>
     </Keywords>
 		
 		<Keywords color="ThisOrBaseReference">
@@ -214,6 +194,7 @@
 			<Word>enum</Word>
 			<Word>float</Word>
 			<Word>int</Word>
+      <Word>object</Word>
       <Word>string</Word>
 			<Word>long</Word>
 			<Word>sbyte</Word>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/MarkDown-Mode.xshd b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/MarkDown-Mode.xshd
index ead5045ab..8e02db898 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/MarkDown-Mode.xshd
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/MarkDown-Mode.xshd
@@ -5,7 +5,6 @@
 	<Color name="StrongEmphasis" fontWeight="bold" exampleText="**this** is more important!" />
 	<Color name="Code" exampleText="this is `int.GetHashCode()`" />
 	<Color name="BlockQuote" foreground="DarkBlue" exampleText="&gt; This is a\r\n&gt; quote." />
-	<Color name="Link" foreground="Blue" exampleText="[text](http://example.com)" />
 	<Color name="Image" foreground="Green" exampleText="[text][http://example.com/test.png]" />
 	<Color name="LineBreak" background="LightGray" exampleText="end of line      \r\n2nd line   " />
 	
@@ -43,12 +42,6 @@
 		<Rule color="Image">
 			\!\[.*\]\[.*\]
 		</Rule>
-		<Rule color="Link">
-			\[.*\]\(.*\)
-		</Rule>
-		<Rule color="Link">
-			\[.*\]\[.*\]
-		</Rule>
 		<Rule color="LineBreak">
 			[ ]{2}$
 		</Rule>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/XML-Mode.xshd b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/XML-Mode.xshd
index 8f0bdef76..50fdc0e2c 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/XML-Mode.xshd
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/Resources/XML-Mode.xshd
@@ -1,13 +1,13 @@
 <SyntaxDefinition name="XML" extensions=".xml;.xsl;.xslt;.xsd;.manifest;.config;.addin;.xshd;.wxs;.wxi;.wxl;.proj;.csproj;.vbproj;.ilproj;.booproj;.build;.xfrm;.targets;.xaml;.xpt;.xft;.map;.wsdl;.disco;.ps1xml;.nuspec" xmlns="http://icsharpcode.net/sharpdevelop/syntaxdefinition/2008">
 	<Color foreground="Green" name="Comment" exampleText="&lt;!-- comment --&gt;" />
-	<Color foreground="Blue" name="CData" exampleText="&lt;![CDATA[data]]&gt;" />
-	<Color foreground="Blue" name="DocType" exampleText="&lt;!DOCTYPE rootElement&gt;" />
-	<Color foreground="Blue" name="XmlDeclaration" exampleText='&lt;?xml version="1.0"?&gt;' />
-	<Color foreground="DarkMagenta" name="XmlTag" exampleText='&lt;tag attribute="value" /&gt;' />
-	<Color foreground="Red" name="AttributeName" exampleText='&lt;tag attribute="value" /&gt;' />
-	<Color foreground="Blue" name="AttributeValue" exampleText='&lt;tag attribute="value" /&gt;' />
+	<Color foreground="#3F92D6" name="CData" exampleText="&lt;![CDATA[data]]&gt;" />
+	<Color foreground="#C8C8C7" name="DocType" exampleText="&lt;!DOCTYPE rootElement&gt;" />
+	<Color foreground="#3F92D6" name="XmlDeclaration" exampleText='&lt;?xml version="1.0"?&gt;' />
+	<Color foreground="#3F92D6" name="XmlTag" exampleText='&lt;tag attribute="value" /&gt;' />
+	<Color foreground="#92CAF4" name="AttributeName" exampleText='&lt;tag attribute="value" /&gt;' />
+	<Color foreground="#C8C8C7" name="AttributeValue" exampleText='&lt;tag attribute="value" /&gt;' />
 	<Color foreground="Teal" name="Entity" exampleText="index.aspx?a=1&amp;amp;b=2" />
-	<Color foreground="Olive" name="BrokenEntity" exampleText="index.aspx?a=1&amp;b=2" />
+	<Color foreground="Red" name="BrokenEntity" exampleText="index.aspx?a=1&amp;b=2" />
 	
 	<RuleSet>
 		<Span color="Comment" multiline="true">
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/break_point_arrow.png b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/break_point_arrow.png
new file mode 100644
index 000000000..e8d367028
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/break_point_arrow.png
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/event.png b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/event.png
new file mode 100644
index 000000000..4566835c0
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/event.png
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/snippet.png b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/snippet.png
new file mode 100644
index 000000000..fe4d71eb4
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Images/snippet.png
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/CompletionItem.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/CompletionItem.cs
index c8beebd28..191f99b6c 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/CompletionItem.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/CompletionItem.cs
@@ -31,7 +31,7 @@ namespace Tango.Scripting.Editors.Intellisense
             int index = editor.GetCurrentWordStartIndex();
             int max = editor.GetCurrentLine().EndOffset;
 
-            editor.Document.Replace(index, word.Length,Text);
+            editor.Document.Replace(index, word.Length, GetCode());
         }
 
         public abstract BitmapSource Image { get; }
@@ -41,6 +41,11 @@ namespace Tango.Scripting.Editors.Intellisense
             return new BitmapImage(new Uri($"pack://application:,,,/Tango.Scripting.Editors;component/Images/{name}", UriKind.Absolute));
         }
 
+        protected virtual String GetCode()
+        {
+            return Text;
+        }
+
         public override string ToString()
         {
             return Text;
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/EventCompletionItem.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/EventCompletionItem.cs
new file mode 100644
index 000000000..5c510c39f
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/EventCompletionItem.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media.Imaging;
+
+namespace Tango.Scripting.Editors.Intellisense
+{
+    public class EventCompletionItem : CompletionItem
+    {
+        private static BitmapSource image = GetImage("event.png");
+
+        public override string Text => Name;
+        public override CompletionItemPopupControl PopupControl => new FieldCompletionItemPopup();
+        public override BitmapSource Image => image;
+
+        public String Name { get; set; }
+        public String Class { get; set; }
+        public String Type { get; set; }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/HideIntellisenseAttribute.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/HideIntellisenseAttribute.cs
new file mode 100644
index 000000000..548bd909e
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/HideIntellisenseAttribute.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Editors.Intellisense
+{
+    public class HideIntellisenseAttribute : Attribute
+    {
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownType.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownType.cs
index 28f9ccb9a..8010dc689 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownType.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownType.cs
@@ -1,11 +1,14 @@
-using System;
+using Newtonsoft.Json;
+using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Drawing;
 using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows.Forms;
 using System.Xml;
 using Tango.Core;
 
@@ -14,16 +17,18 @@ namespace Tango.Scripting.Editors.Intellisense
     public class KnownType
     {
         private bool _initialized;
-        private bool _documentationLoaded;
 
+        public String Alias { get; set; }
+        public bool DocumentationLoaded { get; set; }
         public Type Type { get; private set; }
-        public String Name { get; private set; }
+        public String Name { get; set; }
         public String TypeDefinition { get; private set; }
         public String FriendlyName { get; private set; }
         public String Summary { get; set; }
         public List<KnownTypeConstructor> Constructors { get; set; }
         public List<KnownTypeMethod> Methods { get; set; }
         public List<KnownTypeProperty> Properties { get; set; }
+        public List<KnownTypeEvent> Events { get; set; }
         public List<KnownTypeMember> Members
         {
             get
@@ -32,12 +37,20 @@ namespace Tango.Scripting.Editors.Intellisense
 
                 members.AddRange(Properties);
                 members.AddRange(Methods);
+                members.AddRange(Events);
 
                 return members.OrderBy(x => x.Name).ToList();
             }
         }
         public List<KnownTypeField> Fields { get; set; }
 
+        public static List<Assembly> ExtensionMethodsAssemblies { get; set; }
+
+        static KnownType()
+        {
+            ExtensionMethodsAssemblies = new List<Assembly>();
+        }
+
         public KnownType(Type type)
         {
             Summary = "Loading documentation...";
@@ -45,6 +58,7 @@ namespace Tango.Scripting.Editors.Intellisense
             Methods = new List<KnownTypeMethod>();
             Properties = new List<KnownTypeProperty>();
             Fields = new List<KnownTypeField>();
+            Events = new List<KnownTypeEvent>();
             Type = type;
             Name = type.Name;
 
@@ -118,9 +132,31 @@ namespace Tango.Scripting.Editors.Intellisense
                 {
                     var methods = Type.GetRuntimeMethods().Where(x => x.IsPublic && !x.IsSpecialName).ToList();
 
+                    if (Type.IsInterface)
+                    {
+                        foreach (var inter in Type.GetInterfaces())
+                        {
+                            methods.AddRange(inter.GetRuntimeMethods().Where(x => x.IsPublic && !x.IsSpecialName).ToList());
+                        }
+                        methods = methods.Distinct().ToList();
+
+                        if (!methods.Exists(x => x.Name == "ToString"))
+                        {
+                            methods.Add(typeof(Object).GetMethod("ToString"));
+                        }
+                    }
+
                     //TODO: Separate extension methods!
                     methods.AddRange(Type.GetExtensionMethods(Type.Assembly).ToList());
 
+                    if (Type.Namespace.StartsWith("Tango"))
+                    {
+                        foreach (var asm in ExtensionMethodsAssemblies.Where(x => x != Type.Assembly))
+                        {
+                            methods.AddRange(Type.GetExtensionMethods(asm).ToList());
+                        }
+                    }
+
                     if (typeof(IEnumerable).IsAssignableFrom(Type))
                     {
                         var linqMethods = typeof(System.Linq.Enumerable).GetMethods(BindingFlags.Static | BindingFlags.Public).ToList();
@@ -131,10 +167,13 @@ namespace Tango.Scripting.Editors.Intellisense
                     {
                         var method = methods[i];
 
+                        if (method.GetCustomAttribute<HideIntellisenseAttribute>() != null) continue;
+
                         KnownTypeMethod m = new KnownTypeMethod(this);
                         m.Name = method.Name;
                         m.ReturnType = method.ReturnType;
                         m.ReturnTypeFriendlyName = method.ReturnType.GetFriendlyName();
+                        m.IsStatic = method.IsStatic && !method.IsDefined(typeof(System.Runtime.CompilerServices.ExtensionAttribute), false);
 
                         if (method.IsGenericMethod)
                         {
@@ -148,6 +187,11 @@ namespace Tango.Scripting.Editors.Intellisense
 
                         bool isLinq = method.DeclaringType == typeof(Enumerable);
 
+                        if (isLinq)
+                        {
+                            m.IsStatic = false;
+                        }
+
                         for (int j = 0; j < parameters.Count; j++)
                         {
                             var parameter = parameters[j];
@@ -171,12 +215,14 @@ namespace Tango.Scripting.Editors.Intellisense
 
                 //Load Properties
                 {
-                    var properties = Type.GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(x => x.PropertyType.IsPublic).ToList();
+                    var properties = Type.GetProperties(BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static).ToList();
 
                     for (int i = 0; i < properties.Count; i++)
                     {
                         var property = properties[i];
 
+                        if (property.GetCustomAttribute<HideIntellisenseAttribute>() != null) continue;
+
                         KnownTypeProperty p = new KnownTypeProperty(this);
                         p.Name = property.Name;
                         p.ReturnType = property.PropertyType;
@@ -186,6 +232,23 @@ namespace Tango.Scripting.Editors.Intellisense
                     }
                 }
 
+                //Load Events
+                {
+                    var events = Type.GetRuntimeEvents().ToList();
+
+                    for (int i = 0; i < events.Count; i++)
+                    {
+                        var ev = events[i];
+
+                        if (ev.GetCustomAttribute<HideIntellisenseAttribute>() != null) continue;
+
+                        KnownTypeEvent p = new KnownTypeEvent(this);
+                        p.Name = ev.Name;
+
+                        Events.Add(p);
+                    }
+                }
+
                 //Load Enum Values
                 {
                     if (Type.IsEnum)
@@ -211,9 +274,9 @@ namespace Tango.Scripting.Editors.Intellisense
 
         public void LoadDocumentation()
         {
-            if (!_documentationLoaded)
+            if (!DocumentationLoaded)
             {
-                _documentationLoaded = true;
+                DocumentationLoaded = true;
 
                 Utils.LoadKnownTypeDocs(this);
             }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeEvent.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeEvent.cs
new file mode 100644
index 000000000..7403d2cbd
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeEvent.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Editors.Intellisense
+{
+    public class KnownTypeEvent : KnownTypeMember
+    {
+        public KnownTypeEvent()
+        {
+            Summary = "Loading documentation...";
+        }
+
+        public KnownTypeEvent(KnownType knownType) : this()
+        {
+            Type = knownType;
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeMethod.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeMethod.cs
index f84e26fe5..4cedad377 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeMethod.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/KnownTypeMethod.cs
@@ -8,6 +8,8 @@ namespace Tango.Scripting.Editors.Intellisense
 {
     public class KnownTypeMethod : KnownTypeMember
     {
+        public bool IsStatic { get; set; }
+
         public List<KnownTypeMethodParameter> Parameters { get; set; }
 
         public List<String> TypeArguments { get; set; }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/SnippetCompletionItem.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/SnippetCompletionItem.cs
new file mode 100644
index 000000000..97807ed19
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/SnippetCompletionItem.cs
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media.Imaging;
+
+namespace Tango.Scripting.Editors.Intellisense
+{
+    public class SnippetCompletionItem : CompletionItem
+    {
+        private static BitmapSource image = GetImage("snippet.png");
+
+        public override string Text => Name;
+        public override CompletionItemPopupControl PopupControl => new FieldCompletionItemPopup();
+        public override BitmapSource Image => image;
+
+        public String Name { get; set; }
+        public String Code { get; set; }
+
+        protected override string GetCode()
+        {
+            return Code;
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/Utils.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/Utils.cs
index f8cc7072d..2ead15d0d 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/Utils.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Intellisense/Utils.cs
@@ -150,7 +150,12 @@ namespace Tango.Scripting.Editors.Intellisense
                     var property = knownType.Properties[i];
                     var pDoc = docNodes.FirstOrDefault(x => x.Attributes["name"].InnerText.Contains(knownType.Type.Name + "." + property.Name));
 
-                    property.Summary = pDoc != null ? pDoc.SelectSingleNode("summary").InnerXml : "No documentation";
+
+                    if (pDoc != null)
+                    {
+                        var summaryNode = pDoc.SelectSingleNode("summary");
+                        property.Summary = summaryNode != null ? summaryNode.InnerXml : "No documentation";
+                    }
                 }
             }
 
@@ -162,7 +167,12 @@ namespace Tango.Scripting.Editors.Intellisense
                     {
                         var field = knownType.Fields[i];
                         var pDoc = xmlDoc.SelectSingleNode("//member[starts-with(@name, '" + $"F:{knownType.Type.FullName}.{field.Name}" + "')]");
-                        field.Summary = pDoc != null ? pDoc.SelectSingleNode("summary").InnerXml : "No documentation";
+
+                        if (pDoc != null)
+                        {
+                            var summaryNode = pDoc.SelectSingleNode("summary");
+                            field.Summary = summaryNode != null ? summaryNode.InnerXml : "No documentation";
+                        }
                     }
                 }
             }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextView.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextView.cs
index 3dabb6b7a..1b1f12ff3 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextView.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextView.cs
@@ -554,7 +554,7 @@ namespace Tango.Scripting.Editors.Rendering
 		/// </summary>
 		public static readonly DependencyProperty LinkTextForegroundBrushProperty =
 			DependencyProperty.Register("LinkTextForegroundBrush", typeof(Brush), typeof(TextView),
-			                            new FrameworkPropertyMetadata(Brushes.Blue));
+			                            new FrameworkPropertyMetadata(Brushes.Gray));
 		
 		/// <summary>
 		/// Gets/sets the Brush used for displaying link texts.
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ScriptEditor.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ScriptEditor.cs
index efa1b087a..e65ff671d 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ScriptEditor.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/ScriptEditor.cs
@@ -1,8 +1,10 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel.Design;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
@@ -23,7 +25,9 @@ using System.Windows.Navigation;
 using System.Windows.Shapes;
 using System.Windows.Threading;
 using System.Xml;
+using Tango.Core;
 using Tango.Core.Commands;
+using Tango.Scripting.Core;
 using Tango.Scripting.Editors.CodeCompletion;
 using Tango.Scripting.Editors.Document;
 using Tango.Scripting.Editors.Editing;
@@ -33,6 +37,7 @@ using Tango.Scripting.Editors.Highlighting.Xshd;
 using Tango.Scripting.Editors.Intellisense;
 using Tango.Scripting.Editors.Popups;
 using Tango.Scripting.Editors.Rendering;
+using Tango.Scripting.Formatting;
 using Tango.Scripting.Parsing;
 
 namespace Tango.Scripting.Editors
@@ -42,7 +47,10 @@ namespace Tango.Scripting.Editors
         private char[] word_separators = { ' ', '\t', '\n', '.', '(', ',', '-', '*', '/', '+', '$', '=', '<', '>' };
         private string[] _blocking_type_words = { "class", "void" };
 
+        public event EventHandler<BreakPointSymbolPressedEventArgs> BreakPointSymbolPressed;
+
         private DispatcherTimer _update_timer;
+        private BreakPointMargin breakPointMargin;
         private Popup _popup;
         private FoldingManager foldingManager;
         private BraceFoldingStrategy foldingStrategy;
@@ -52,9 +60,48 @@ namespace Tango.Scripting.Editors
         private List<KnownType> _knownTypes;
         private List<ScriptType> _declaredTypes;
         private bool _isLoadingTypes;
+        private TextMarkerService errorMarkerService;
+        private List<ScriptBreakPointSymbol> _breakPointSymbols;
+        private int _breakPointLineNumber;
+        private ScriptBreakPointSymbol _currentBreakPointSymbol;
+        private Point _currentBreakPointSymbolPosition;
+
+        private static JsonSerializerSettings _jsonSettings;
+        private static Dictionary<Type, KnownType> _knownTypesCache;
+        private static String KNOWN_TYPES_CACHE_FOLDER;
+        private static List<CachedAssembly> _cachedAssemblies;
+        private static List<CachedUsing> _cachedUsings;
+        private static bool _isLoadingCachedAssemblies;
+        private static bool _isCacheAssembliesLoaded;
+        private static bool _isUsingsLoadingStarted;
+        private static object _loadUsingsLock = new object();
+        private static List<SnippetCompletionItem> snippets;
+
+        public static event EventHandler<TangoProgressChangedEventArgs<int>> LoadingSymbolsProgress;
+        public static event EventHandler LoadingSymbolsStarted;
+        public static event EventHandler LoadingSymbolsCompleted;
+        private static event EventHandler KnownTypesAvailable;
+        public static event EventHandler UsingsLoadingStarted;
+        public static event EventHandler UsingsLoadingCompleted;
 
         #region Mini Classes
 
+        private class KnownTypeResult
+        {
+            public KnownType KnownType { get; set; }
+            public bool IsStatic { get; set; }
+
+            public KnownTypeResult()
+            {
+
+            }
+
+            public KnownTypeResult(KnownType knownType)
+            {
+                KnownType = knownType;
+            }
+        }
+
         private class ScriptClass
         {
             public String Name { get; set; }
@@ -85,6 +132,8 @@ namespace Tango.Scripting.Editors
 
         #region Properties
 
+        public static List<String> BlockedUsingsCache { get; set; }
+
         /// <summary>
         /// Gets or sets a value indicating whether to enable folding.
         /// </summary>
@@ -110,13 +159,13 @@ namespace Tango.Scripting.Editors
         /// <summary>
         /// Gets or sets the reference assemblies.
         /// </summary>
-        public ObservableCollection<ReferenceAssembly> ReferenceAssemblies
+        public ObservableCollection<Assembly> ReferenceAssemblies
         {
-            get { return (ObservableCollection<ReferenceAssembly>)GetValue(ReferenceAssembliesProperty); }
+            get { return (ObservableCollection<Assembly>)GetValue(ReferenceAssembliesProperty); }
             set { SetValue(ReferenceAssembliesProperty, value); }
         }
         public static readonly DependencyProperty ReferenceAssembliesProperty =
-            DependencyProperty.Register("ReferenceAssemblies", typeof(ObservableCollection<ReferenceAssembly>), typeof(ScriptEditor), new PropertyMetadata(null));
+            DependencyProperty.Register("ReferenceAssemblies", typeof(ObservableCollection<Assembly>), typeof(ScriptEditor), new PropertyMetadata(null, (d, e) => (d as ScriptEditor).OnReferenceAssembliesChanged()));
 
         public Object CurrentPopupContent
         {
@@ -126,6 +175,70 @@ namespace Tango.Scripting.Editors
         public static readonly DependencyProperty CurrentPopupContentProperty =
             DependencyProperty.Register("CurrentPopupContent", typeof(Object), typeof(ScriptEditor), new PropertyMetadata(null));
 
+        public String Code
+        {
+            get { return (String)GetValue(CodeProperty); }
+            set { SetValue(CodeProperty, value); }
+        }
+        public static readonly DependencyProperty CodeProperty =
+            DependencyProperty.Register("Code", typeof(String), typeof(ScriptEditor), new PropertyMetadata(null, (d, e) => (d as ScriptEditor).OnCodeChanged()));
+
+        public ObservableCollection<IScriptSource> AdditionalScripts
+        {
+            get { return (ObservableCollection<IScriptSource>)GetValue(AdditionalScriptsProperty); }
+            set { SetValue(AdditionalScriptsProperty, value); }
+        }
+        public static readonly DependencyProperty AdditionalScriptsProperty =
+            DependencyProperty.Register("AdditionalScripts", typeof(ObservableCollection<IScriptSource>), typeof(ScriptEditor), new PropertyMetadata(null));
+
+        public Brush ColorizeBrush
+        {
+            get { return (Brush)GetValue(ColorizeBrushProperty); }
+            set { SetValue(ColorizeBrushProperty, value); }
+        }
+        public static readonly DependencyProperty ColorizeBrushProperty =
+            DependencyProperty.Register("ColorizeBrush", typeof(Brush), typeof(ScriptEditor), new PropertyMetadata(new SolidColorBrush(Colors.YellowGreen) { Opacity = 0.5 }));
+
+        public Brush ErrorLineBrush
+        {
+            get { return (Brush)GetValue(ErrorLineBrushProperty); }
+            set { SetValue(ErrorLineBrushProperty, value); }
+        }
+        public static readonly DependencyProperty ErrorLineBrushProperty =
+            DependencyProperty.Register("ErrorLineBrush", typeof(Brush), typeof(ScriptEditor), new PropertyMetadata(new SolidColorBrush(Colors.Red) { Opacity = 0.5 }));
+
+        public Brush DebugLineBrush
+        {
+            get { return (Brush)GetValue(DebugLineBrushProperty); }
+            set { SetValue(DebugLineBrushProperty, value); }
+        }
+        public static readonly DependencyProperty DebugLineBrushProperty =
+            DependencyProperty.Register("DebugLineBrush", typeof(Brush), typeof(ScriptEditor), new PropertyMetadata(new SolidColorBrush(Colors.Gray) { Opacity = 0.5 }));
+
+        public Brush BreakPointLineBrush
+        {
+            get { return (Brush)GetValue(BreakPointLineBrushProperty); }
+            set { SetValue(BreakPointLineBrushProperty, value); }
+        }
+        public static readonly DependencyProperty BreakPointLineBrushProperty =
+            DependencyProperty.Register("BreakPointLineBrush", typeof(Brush), typeof(ScriptEditor), new PropertyMetadata(new SolidColorBrush(Colors.Yellow) { Opacity = 0.5 }));
+
+        public IScriptSource ScriptSource
+        {
+            get { return (IScriptSource)GetValue(ScriptSourceProperty); }
+            set { SetValue(ScriptSourceProperty, value); }
+        }
+        public static readonly DependencyProperty ScriptSourceProperty =
+            DependencyProperty.Register("ScriptSource", typeof(IScriptSource), typeof(ScriptEditor), new PropertyMetadata(null));
+
+        public bool DisableBreakPoints
+        {
+            get { return (bool)GetValue(DisableBreakPointsProperty); }
+            set { SetValue(DisableBreakPointsProperty, value); }
+        }
+        public static readonly DependencyProperty DisableBreakPointsProperty =
+            DependencyProperty.Register("DisableBreakPoints", typeof(bool), typeof(ScriptEditor), new PropertyMetadata(false));
+
 
         #endregion
 
@@ -137,6 +250,87 @@ namespace Tango.Scripting.Editors
         static ScriptEditor()
         {
             DefaultStyleKeyProperty.OverrideMetadata(typeof(ScriptEditor), new FrameworkPropertyMetadata(typeof(ScriptEditor)));
+
+            snippets = new List<SnippetCompletionItem>();
+
+            BlockedUsingsCache = new List<string>();
+
+            if (KNOWN_TYPES_CACHE_FOLDER == null)
+            {
+                KNOWN_TYPES_CACHE_FOLDER = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Twine", "Tango", "Scripting", "Cache");
+                Directory.CreateDirectory(KNOWN_TYPES_CACHE_FOLDER);
+            }
+
+            _jsonSettings = new JsonSerializerSettings()
+            {
+                TypeNameHandling = TypeNameHandling.Auto,
+                PreserveReferencesHandling = PreserveReferencesHandling.All
+            };
+
+            _knownTypesCache = new Dictionary<Type, KnownType>();
+            _cachedAssemblies = new List<CachedAssembly>();
+            _cachedUsings = new List<CachedUsing>();
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "for",
+                Code = @"for (int i = 0; i < 10; i++)
+        {
+            
+        }"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "while",
+                Code = @"while (true)
+        {
+            
+        }"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "foreach",
+                Code = @"foreach (var item in items)
+        {
+            
+        }"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "prop",
+                Code = @"public int MyProperty { get; set; }"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "do",
+                Code = @"do
+        {
+            
+        } while (true)"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "try",
+                Code = @"try
+        {
+                
+        }
+        catch (Exception ex)
+        {
+            
+        }"
+            });
+
+            snippets.Add(new SnippetCompletionItem()
+            {
+                Name = "cw",
+                Code = "context.WriteLine(\"\");"
+            });
         }
 
         /// <summary>
@@ -148,16 +342,17 @@ namespace Tango.Scripting.Editors
 
             _current_usings = new List<string>();
 
-            ReferenceAssemblies = new ObservableCollection<ReferenceAssembly>();
+            //ReferenceAssemblies = new ObservableCollection<ReferenceAssembly>();
 
-            //Add basic assemblies...
-            ReferenceAssemblies.Add(new ReferenceAssembly(typeof(String))); //mscorelib
-            ReferenceAssemblies.Add(new ReferenceAssembly(typeof(Enumerable))); //System.Core
-            ReferenceAssemblies.Add(new ReferenceAssembly(typeof(Tango.Core.CoreSettings))); //System.Core
+            ////Add basic assemblies...
+            //ReferenceAssemblies.Add(new ReferenceAssembly(typeof(String))); //mscorelib
+            //ReferenceAssemblies.Add(new ReferenceAssembly(typeof(Enumerable))); //System.Core
 
             _knownTypes = new List<KnownType>();
             _parser = new ScriptParser();
 
+            KnownTypesAvailable += ScriptEditor_KnownTypesAvailable;
+
             TextArea.IndentationStrategy = new Indentation.CSharp.CSharpIndentationStrategy(Options);
             foldingStrategy = new BraceFoldingStrategy();
 
@@ -175,6 +370,59 @@ namespace Tango.Scripting.Editors
             completionWindow.AllowsTransparency = true;
             completionWindow.ResizeMode = ResizeMode.NoResize;
             completionWindow.InsertionRequest += CompletionWindow_InsertionRequest;
+
+            TextChanged += ScriptEditor_TextChanged;
+
+            errorMarkerService = new TextMarkerService(Document);
+            TextArea.TextView.BackgroundRenderers.Add(errorMarkerService);
+            TextArea.TextView.LineTransformers.Add(errorMarkerService);
+
+            Unloaded += ScriptEditor_Unloaded;
+
+            breakPointMargin = new BreakPointMargin(this);
+            _breakPointSymbols = new List<ScriptBreakPointSymbol>();
+            Loaded += ScriptEditor_Loaded;
+
+            MouseMove += ScriptEditor_MouseMove;
+        }
+
+        private void ScriptEditor_Loaded(object sender, RoutedEventArgs e)
+        {
+            TextArea.LeftMargins.Insert(0, breakPointMargin);
+        }
+
+        private void ScriptEditor_Unloaded(object sender, RoutedEventArgs e)
+        {
+            _update_timer.Stop();
+        }
+
+        private void ScriptEditor_KnownTypesAvailable(object sender, EventArgs e)
+        {
+            if (sender != this)
+            {
+                InvalidateHighlightingPartial();
+            }
+        }
+
+        private bool preventCodeUpdate;
+        private void ScriptEditor_TextChanged(object sender, EventArgs e)
+        {
+            if (!preventCodeUpdate)
+            {
+                preventCodeUpdate = true;
+                Code = Text;
+                preventCodeUpdate = false;
+            }
+        }
+
+        private void OnCodeChanged()
+        {
+            if (!preventCodeUpdate)
+            {
+                preventCodeUpdate = true;
+                Text = Code;
+                preventCodeUpdate = false;
+            }
         }
 
         #endregion
@@ -279,18 +527,18 @@ namespace Tango.Scripting.Editors
             }
             else if (e.Key == Key.Oem2)
             {
-                int offset = CaretOffset;
-                var line = Document.GetLineByOffset(offset);
+                //int offset = CaretOffset;
+                //var line = Document.GetLineByOffset(offset);
 
-                String text = GetCurrentLineText();
-                if (text.TrimStart('\t', ' ').StartsWith("//"))
-                {
-                    Document.BeginUpdate();
-                    Document.Replace(line, "/// <summary>\n/// \n/// </summary>");
-                    Document.EndUpdate();
-                    e.Handled = true;
-                    CaretOffset = Document.GetLineByNumber(line.LineNumber + 1).EndOffset;
-                }
+                //String text = GetCurrentLineText();
+                //if (text.TrimStart('\t', ' ').StartsWith("//"))
+                //{
+                //    Document.BeginUpdate();
+                //    Document.Replace(line, "/// <summary>\n/// \n/// </summary>");
+                //    Document.EndUpdate();
+                //    e.Handled = true;
+                //    CaretOffset = Document.GetLineByNumber(line.LineNumber + 1).EndOffset;
+                //}
             }
             else if (e.Key == Key.End || e.Key == Key.Home)
             {
@@ -304,474 +552,509 @@ namespace Tango.Scripting.Editors
 
         private void TextArea_TextEntered(object sender, TextCompositionEventArgs e)
         {
-            List<Object> items = new List<object>();
+            if (IsReadOnly) return;
 
-            HidePopup();
+            try
+            {
+                List<Object> items = new List<object>();
 
-            var lineText = GetCurrentLineText();
-            var previousWords = GetPreviousWords();
-            var previousWordsLast = previousWords.LastOrDefault();
-            String currentWord = previousWordsLast != null ? previousWordsLast.Replace("\t", "") : String.Empty;
-            String currentWordIncludingParenthesis = currentWord.Split('(').LastOrDefault();
+                HidePopup();
 
-            if (previousWords.Count > 0 && previousWords.First().Trim().StartsWith("//")) return;
+                var lineText = GetCurrentLineText();
+                var previousWords = GetPreviousWords();
+                var previousWordsLast = previousWords.LastOrDefault();
+                String currentWord = previousWordsLast != null ? previousWordsLast.Replace("\t", "") : String.Empty;
+                String currentWordIncludingParenthesis = currentWord.Split('(').LastOrDefault();
 
-            if (e.Text == " " && previousWords.Count > 2 && previousWords[previousWords.Count - 2] == "=")
-            {
-                var expression = previousWords.First();
-                var knownType = GetKnownTypeFromExpression(expression + ".");
+                if (previousWords.Count > 0 && previousWords.First().Trim().StartsWith("//")) return;
 
-                if (knownType != null && knownType.Type.IsEnum)
+                if (e.Text == " " && previousWords.Count > 2 && previousWords[previousWords.Count - 2] == "=")
                 {
-                    completionWindow.HideCompletion();
-                    IList<ICompletionData> data = new List<ICompletionData>();
+                    var expression = previousWords.First();
+                    var knownTypeResult = GetKnownTypeFromExpression(expression + ".");
 
-                    foreach (var field in knownType.Fields)
+                    if (knownTypeResult != null && knownTypeResult.KnownType.Type.IsEnum)
                     {
-                        data.Add(new FieldCompletionItem()
+                        completionWindow.HideCompletion();
+                        IList<ICompletionData> data = new List<ICompletionData>();
+
+                        foreach (var field in knownTypeResult.KnownType.Fields)
                         {
-                            Class = knownType.FriendlyName,
-                            Name = knownType.FriendlyName + "." + field.Name,
-                            Type = field.ReturnTypeFriendlyName,
-                            Description = field.Summary,
-                        });
+                            data.Add(new FieldCompletionItem()
+                            {
+                                Class = knownTypeResult.KnownType.FriendlyName,
+                                Name = knownTypeResult.KnownType.FriendlyName + "." + field.Name,
+                                Type = field.ReturnTypeFriendlyName,
+                                Description = field.Summary,
+                            });
+                        }
+
+                        ShowCompletionWindow(data.OrderBy(x => x.Text).ToList(), GetCurrentWord());
                     }
 
-                    ShowCompletionWindow(data.OrderBy(x => x.Text).ToList(), GetCurrentWord());
                 }
-
-            }
-            else if (e.Text == " " && GetPreviousWord() == "new")
-            {
-                var s = _parser.GetExpressionFirst<FieldDeclarationSyntax>(GetCurrentLineText());
-
-                if (s != null)
+                else if (e.Text == " " && GetPreviousWord() == "new")
                 {
-                    String type = s.Declaration.Type.ToString();
-
-                    IList<ICompletionData> data = new List<ICompletionData>();
+                    var s = _parser.GetExpressionFirst<FieldDeclarationSyntax>(GetCurrentLineText());
 
-                    data.Add(new ClassCompletionItem()
+                    if (s != null)
                     {
-                        Name = type,
-                        Description = "Auto generate assignment...",
-                    });
+                        String type = s.Declaration.Type.ToString();
 
-                    ShowCompletionWindow(data, type);
-                }
-            }
-            else if (e.Text == ";" || e.Text == " ")
-            {
-                HideCompletionWindow();
-            }
-            else if (e.Text == ".")
-            {
-                var knownType = GetCurrentKnownType();
+                        IList<ICompletionData> data = new List<ICompletionData>();
 
-                if (knownType != null)
+                        data.Add(new ClassCompletionItem()
+                        {
+                            Name = type,
+                            Description = "Auto generate assignment...",
+                        });
+
+                        ShowCompletionWindow(data, type);
+                    }
+                }
+                else if (e.Text == ";" || e.Text == " ")
                 {
-                    completionWindow.HideCompletion();
+                    HideCompletionWindow();
+                }
+                else if (e.Text == ".")
+                {
+                    var knownTypeResult = GetCurrentKnownType();
+
                     IList<ICompletionData> data = new List<ICompletionData>();
 
-                    if (!knownType.Type.IsEnum)
+                    if (knownTypeResult != null)
                     {
-                        var typeMembers = knownType.Members.ToList();
+                        completionWindow.HideCompletion();
 
-                        foreach (var methodGroup in typeMembers.OfType<KnownTypeMethod>().GroupBy(x => x.NameWithTypeArguments))
+                        if (!knownTypeResult.KnownType.Type.IsEnum)
                         {
-                            var method = methodGroup.First();
+                            var typeMembers = knownTypeResult.KnownType.Members.ToList();
 
-                            data.Add(new MethodCompletionItem()
+                            foreach (var methodGroup in typeMembers.OfType<KnownTypeMethod>().Where(x => (!knownTypeResult.IsStatic && !x.IsStatic) || (knownTypeResult.IsStatic && x.IsStatic)).GroupBy(x => x.NameWithTypeArguments))
                             {
-                                Class = knownType.FriendlyName,
-                                Name = method.NameWithTypeArguments,
-                                ReturnType = method.ReturnTypeFriendlyName,
-                                Description = method.Summary,
-                                Parameters = method.Parameters,
-                                Overloads = methodGroup.Count() - 1,
-                            });
-                        }
+                                var method = methodGroup.First();
 
-                        foreach (var methodGroup in typeMembers.Where(x => x.GetType() != typeof(KnownTypeMethod)).GroupBy(x => x.Name))
-                        {
-                            var member = methodGroup.First();
+                                data.Add(new MethodCompletionItem()
+                                {
+                                    Class = knownTypeResult.KnownType.FriendlyName,
+                                    Name = method.NameWithTypeArguments,
+                                    ReturnType = method.ReturnTypeFriendlyName,
+                                    Description = method.Summary,
+                                    Parameters = method.Parameters,
+                                    Overloads = methodGroup.Count() - 1,
+                                });
+                            }
 
-                            data.Add(new PropertyCompletionItem()
+                            foreach (var ev in typeMembers.OfType<KnownTypeEvent>())
                             {
-                                Class = knownType.FriendlyName,
-                                Name = member.Name,
-                                Type = member.ReturnTypeFriendlyName,
-                                Description = member.Summary,
-                            });
+                                data.Add(new EventCompletionItem()
+                                {
+                                    Class = knownTypeResult.KnownType.FriendlyName,
+                                    Name = ev.Name,
+                                    Description = ev.Summary,
+                                });
+                            }
 
+                            foreach (var methodGroup in typeMembers.Where(x => x.GetType() != typeof(KnownTypeMethod) && x.GetType() != typeof(KnownTypeEvent)).GroupBy(x => x.Name))
+                            {
+                                var member = methodGroup.First();
+
+                                data.Add(new PropertyCompletionItem()
+                                {
+                                    Class = knownTypeResult.KnownType.FriendlyName,
+                                    Name = member.Name,
+                                    Type = member.ReturnTypeFriendlyName,
+                                    Description = member.Summary,
+                                });
+                            }
                         }
-                    }
-                    else
-                    {
-                        foreach (var field in knownType.Fields)
+                        else
                         {
-                            data.Add(new FieldCompletionItem()
+                            foreach (var field in knownTypeResult.KnownType.Fields)
                             {
-                                Class = knownType.FriendlyName,
-                                Name = field.Name,
-                                Type = field.ReturnTypeFriendlyName,
-                                Description = field.Summary,
-                            });
+                                data.Add(new FieldCompletionItem()
+                                {
+                                    Class = knownTypeResult.KnownType.FriendlyName,
+                                    Name = field.Name,
+                                    Type = field.ReturnTypeFriendlyName,
+                                    Description = field.Summary,
+                                });
 
+                            }
                         }
-                    }
 
-                    ShowCompletionWindow(data.OrderBy(x => x.Text).ToList(), GetCurrentWord());
-                }
-                else
-                {
-                    var declaredType = GetCurrentDeclaredType();
-
-                    if (declaredType != null)
+                        ShowCompletionWindow(data.OrderBy(x => x.Text).ToList(), GetCurrentWord());
+                    }
+                    else
                     {
-                        completionWindow.HideCompletion();
-                        IList<ICompletionData> data = new List<ICompletionData>();
+                        var declaredType = GetCurrentDeclaredType();
 
-                        var typeMembers = declaredType.Symbols.ToList();
-
-                        foreach (var methodGroup in typeMembers.GroupBy(x => x.Name))
+                        if (declaredType != null)
                         {
-                            var member = methodGroup.First();
+                            completionWindow.HideCompletion();
 
-                            if (member.Kind == SymbolKind.Method)
-                            {
-                                var methodCompletion = new MethodCompletionItem()
-                                {
-                                    Class = declaredType.Name,
-                                    Name = member.Name,
-                                    ReturnType = member.Type,
-                                    Description = member.Summary,
-                                    Overloads = methodGroup.Count() - 1,
-                                };
+                            var typeMembers = declaredType.Symbols.ToList();
 
+                            foreach (var methodGroup in typeMembers.GroupBy(x => x.Name))
+                            {
+                                var member = methodGroup.First();
 
-                                for (int i = 0; i < member.Parameters.Count; i++)
+                                if (member.Kind == SymbolKind.Method)
                                 {
-                                    var pair = member.Parameters[i];
+                                    var methodCompletion = new MethodCompletionItem()
+                                    {
+                                        Class = declaredType.Name,
+                                        Name = member.Name,
+                                        ReturnType = member.Type,
+                                        Description = member.Summary,
+                                        Overloads = methodGroup.Count() - 1,
+                                    };
 
-                                    methodCompletion.Parameters.Add(new KnownTypeMethodParameter()
+
+                                    for (int i = 0; i < member.Parameters.Count; i++)
                                     {
-                                        Type = pair.Key,
-                                        Name = pair.Value,
-                                        IsLast = (i == member.Parameters.Count - 1)
-                                    });
-                                }
+                                        var pair = member.Parameters[i];
 
-                                data.Add(methodCompletion);
+                                        methodCompletion.Parameters.Add(new KnownTypeMethodParameter()
+                                        {
+                                            Type = pair.Key,
+                                            Name = pair.Value,
+                                            IsLast = (i == member.Parameters.Count - 1)
+                                        });
+                                    }
 
-                            }
-                            else if (member.Kind == SymbolKind.Property)
-                            {
-                                data.Add(new PropertyCompletionItem()
+                                    data.Add(methodCompletion);
+
+                                }
+                                else if (member.Kind == SymbolKind.Property)
                                 {
-                                    Class = declaredType.Name,
-                                    Name = member.Name,
-                                    Type = member.Type,
-                                    Description = member.Summary,
-                                });
-                            }
-                            else if (member.Kind == SymbolKind.Field)
-                            {
-                                data.Add(new FieldCompletionItem()
+                                    data.Add(new PropertyCompletionItem()
+                                    {
+                                        Class = declaredType.Name,
+                                        Name = member.Name,
+                                        Type = member.Type,
+                                        Description = member.Summary,
+                                    });
+                                }
+                                else if (member.Kind == SymbolKind.Field)
                                 {
-                                    Class = declaredType.Name,
-                                    Name = member.Name,
-                                    Type = member.Type,
-                                    Description = member.Summary,
-                                });
+                                    data.Add(new FieldCompletionItem()
+                                    {
+                                        Class = declaredType.Name,
+                                        Name = member.Name,
+                                        Type = member.Type,
+                                        Description = member.Summary,
+                                    });
+                                }
                             }
-                        }
 
-                        ShowCompletionWindow(data, GetCurrentWord());
+                            ShowCompletionWindow(data, GetCurrentWord());
+                        }
                     }
                 }
-            }
-            else if (e.Text == "(" || e.Text == ",")
-            {
-                completionWindow.HideCompletion();
-
-                try
+                else if (e.Text == "(" || e.Text == ",")
                 {
-                    var session = GetConstructionSession();
+                    completionWindow.HideCompletion();
 
-                    if (session != null)
+                    try
                     {
-                        var content = CreateConstructionSessionPopupContent(session);
-                        if (content.Methods.Count > 0)
+                        var session = GetConstructionSession();
+
+                        if (session != null)
                         {
-                            ShowPopup(content);
-                            return;
+                            var content = CreateConstructionSessionPopupContent(session);
+                            if (content.Methods.Count > 0)
+                            {
+                                ShowPopup(content);
+                                return;
+                            }
                         }
-                    }
 
-                    var methodSession = GetMethodSession();
+                        var methodSession = GetMethodSession();
 
-                    if (methodSession != null)
-                    {
-                        var content = CreateMethodSessionPopupContent(methodSession);
-                        if (content.Methods.Count > 0)
+                        if (methodSession != null)
                         {
-                            ShowPopup(content);
-                            return;
+                            var content = CreateMethodSessionPopupContent(methodSession);
+                            if (content.Methods.Count > 0)
+                            {
+                                ShowPopup(content);
+                                return;
+                            }
                         }
-                    }
 
-                    var declaredMethodSession = GetDeclaredMethodSession();
+                        var declaredMethodSession = GetDeclaredMethodSession();
 
-                    if (declaredMethodSession != null)
-                    {
-                        var content = CreateDeclaredMethodSessionPopupContent(declaredMethodSession);
-                        if (content.Methods.Count > 0)
+                        if (declaredMethodSession != null)
                         {
-                            ShowPopup(content);
-                            return;
+                            var content = CreateDeclaredMethodSessionPopupContent(declaredMethodSession);
+                            if (content.Methods.Count > 0)
+                            {
+                                ShowPopup(content);
+                                return;
+                            }
+                        }
+
+                        var staticMethodSession = GetStaticMethodSession();
+
+                        if (staticMethodSession != null)
+                        {
+                            var content = CreateMethodSessionPopupContent(staticMethodSession);
+                            if (content.Methods.Count > 0)
+                            {
+                                ShowPopup(content);
+                                return;
+                            }
                         }
                     }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine(ex);
+                    }
                 }
-                catch (Exception ex)
-                {
-                    Debug.WriteLine(ex);
-                }
-            }
-            else if (lineText.StartsWith("using"))
-            {
-                if (completionWindow.IsVisible)
+                else if (lineText.StartsWith("using") && e.Text != "\n")
                 {
-                    completionWindow.UpdatePositionFix();
-                    return;
-                }
+                    if (completionWindow.IsVisible)
+                    {
+                        completionWindow.UpdatePositionFix();
+                        return;
+                    }
 
-                IList<ICompletionData> data = new List<ICompletionData>();
+                    IList<ICompletionData> data = new List<ICompletionData>();
 
-                foreach (var asm in ReferenceAssemblies)
-                {
-                    foreach (var ns in asm.Assembly.GetTypes().Select(x => x.Namespace).Distinct().Where(x => x != null))
+                    foreach (var asm in ReferenceAssemblies)
                     {
-                        data.Add(new NamespaceCompletionItem()
+                        foreach (var ns in asm.GetTypes().Select(x => x.Namespace).Distinct().Where(x => x != null))
                         {
-                            Name = ns,
-                            Assembly = asm.Assembly.GetName().Name,
-                        });
+                            data.Add(new NamespaceCompletionItem()
+                            {
+                                Name = ns,
+                                Assembly = asm.GetName().Name,
+                            });
+                        }
                     }
-                }
 
-                data = data.DistinctBy(x => x.Text).ToList();
+                    data = data.DistinctBy(x => x.Text).ToList();
 
-                ShowCompletionWindow(data, GetCurrentWord());
-            }
-            else if (e.Text == "{")
-            {
-                int parentesisCount = lineText.TakeWhile(x => x != '{').Count(x => x == '\"');
-
-                if (parentesisCount % 2 == 0)
-                {
-                    Document.Insert(CaretOffset, "}");
-                    CaretOffset--;
+                    ShowCompletionWindow(data, GetCurrentWord());
                 }
-            }
-            else if (e.Text == "}")
-            {
-                if (Document.GetText(CaretOffset - 2, 1) == "{" && Document.GetText(CaretOffset, 1) == "}")
+                else if (e.Text == "{")
                 {
-                    Document.Replace(CaretOffset, 1, "");
-                }
-            }
-            else if (e.Text == "\n")
-            {
-                if (Document.GetText(CaretOffset - 3, 1) == "{" && Document.GetText(CaretOffset, 1) == "}")
-                {
-                    CaretOffset--;
-                    Document.Insert(CaretOffset, "\n\t");
+                    int parentesisCount = lineText.TakeWhile(x => x != '{').Count(x => x == '\"');
+
+                    if (parentesisCount % 2 == 0)
+                    {
+                        Document.Insert(CaretOffset, "}");
+                        CaretOffset--;
+                    }
                 }
-            }
-            else if (!currentWordIncludingParenthesis.Contains(".") || currentWord[currentWord.Length - 2] == '<')
-            {
-                if (completionWindow.IsVisible)
+                else if (e.Text == "}")
                 {
-                    completionWindow.UpdatePositionFix();
-                    return;
+                    if (Document.GetText(CaretOffset - 2, 1) == "{" && Document.GetText(CaretOffset, 1) == "}")
+                    {
+                        Document.Replace(CaretOffset, 1, "");
+                    }
                 }
-
-                var previous_word = GetPreviousWord();
-                var word = GetCurrentWord();
-
-                if (word.Contains("<"))
+                else if (e.Text == "\n")
                 {
-                    word = word.Last(x => x != '<').ToString();
+                    if (Document.GetText(CaretOffset - 3, 1) == "{" && Document.GetText(CaretOffset, 1) == "}")
+                    {
+                        CaretOffset--;
+                        Document.Insert(CaretOffset, "\n\t");
+                    }
                 }
-
-                if (previous_word != word)
+                else if (!currentWordIncludingParenthesis.Contains(".") || currentWord[currentWord.Length - 2] == '<')
                 {
-                    if (_knownTypes.Exists(x => x.Name == previous_word))
+                    if (completionWindow.IsVisible)
                     {
+                        completionWindow.UpdatePositionFix();
                         return;
                     }
 
-                    if (_blocking_type_words.Contains(previous_word))
+                    var previous_word = GetPreviousWord();
+                    var word = GetCurrentWord();
+
+                    if (word.Contains("<"))
                     {
-                        return;
+                        word = word.Last(x => x != '<').ToString();
                     }
-                }
 
-                if (!String.IsNullOrWhiteSpace(word))
-                {
-                    IList<ICompletionData> data = new List<ICompletionData>();
-
-                    foreach (var type in _declaredTypes.Where(x => x.Name.StartsWith(word)))
+                    if (previous_word != word)
                     {
-                        if (type.Kind == TypeKind.Struct)
-                        {
-                            data.Add(new StructCompletionItem()
-                            {
-                                Name = type.Name,
-                                Description = type.Summary,
-                                Namespace = type.ContainingNamespace,
-                                Priority = 1,
-                            });
-                        }
-                        else if (type.Kind == TypeKind.Enum)
-                        {
-                            data.Add(new EnumCompletionItem()
-                            {
-                                Name = type.Name,
-                                Description = type.Summary,
-                                Namespace = type.ContainingNamespace,
-                                Priority = 1,
-                            });
-                        }
-                        else if (type.Kind == TypeKind.Interface)
+                        if (_knownTypes.Exists(x => x.Name == previous_word))
                         {
-                            data.Add(new InterfaceCompletionItem()
-                            {
-                                Name = type.Name,
-                                Description = type.Summary,
-                                Namespace = type.ContainingNamespace,
-                                Priority = 1,
-                            });
-                        }
-                        else if (type.Kind == TypeKind.Class)
-                        {
-                            data.Add(new ClassCompletionItem()
-                            {
-                                Name = type.Name,
-                                Description = type.Summary,
-                                Namespace = type.ContainingNamespace,
-                                Priority = 1,
-                            });
+                            return;
                         }
-                        else
+
+                        if (_blocking_type_words.Contains(previous_word))
                         {
-                            throw new NotImplementedException("Implement generic item here!");
+                            return;
                         }
                     }
 
-                    foreach (var type in _knownTypes.ToList().Where(x => x.Name.StartsWith(word)))
+                    if (!String.IsNullOrWhiteSpace(word))
                     {
-                        if (type.Type.IsEnum)
+                        IList<ICompletionData> data = new List<ICompletionData>();
+
+                        foreach (var snippet in snippets)
                         {
-                            data.Add(new EnumCompletionItem()
-                            {
-                                Namespace = type.Type.Namespace,
-                                Description = type.Summary,
-                                Name = type.FriendlyName,
-                                Priority = 0,
-                            });
+                            data.Add(snippet);
                         }
-                        else if (type.Type.IsInterface)
+
+                        foreach (var type in _declaredTypes.Where(x => x.Name.StartsWith(word)))
                         {
-                            data.Add(new InterfaceCompletionItem()
+                            if (type.Kind == TypeKind.Struct)
                             {
-                                Name = type.FriendlyName,
-                                Description = type.Summary,
-                                Namespace = type.Type.Namespace,
-                                Priority = 0,
-                            });
-                        }
-                        else if (type.Type.IsValueType)
-                        {
-                            data.Add(new StructCompletionItem()
+                                data.Add(new StructCompletionItem()
+                                {
+                                    Name = type.Name,
+                                    Description = type.Summary,
+                                    Namespace = type.ContainingNamespace,
+                                    Priority = 1,
+                                });
+                            }
+                            else if (type.Kind == TypeKind.Enum)
                             {
-                                Name = type.FriendlyName,
-                                Description = type.Summary,
-                                Namespace = type.Type.Namespace,
-                                Priority = 0,
-                            });
-                        }
-                        else if (type.Type.IsClass)
-                        {
-                            data.Add(new ClassCompletionItem()
+                                data.Add(new EnumCompletionItem()
+                                {
+                                    Name = type.Name,
+                                    Description = type.Summary,
+                                    Namespace = type.ContainingNamespace,
+                                    Priority = 1,
+                                });
+                            }
+                            else if (type.Kind == TypeKind.Interface)
                             {
-                                Name = type.FriendlyName,
-                                Description = type.Summary,
-                                Namespace = type.Type.Namespace,
-                                Priority = 0,
-                            });
-                        }
-                        else
-                        {
-                            throw new NotImplementedException("Implement generic item here.");
+                                data.Add(new InterfaceCompletionItem()
+                                {
+                                    Name = type.Name,
+                                    Description = type.Summary,
+                                    Namespace = type.ContainingNamespace,
+                                    Priority = 1,
+                                });
+                            }
+                            else if (type.Kind == TypeKind.Class)
+                            {
+                                data.Add(new ClassCompletionItem()
+                                {
+                                    Name = type.Name,
+                                    Description = type.Summary,
+                                    Namespace = type.ContainingNamespace,
+                                    Priority = 1,
+                                });
+                            }
+                            else
+                            {
+                                throw new NotImplementedException("Implement generic item here!");
+                            }
                         }
-                    }
 
-                    foreach (var symbol in _parser.GetContextSymbols(Document.Text, CaretOffset).Where(x => x.Name.StartsWith(GetCurrentWord())))
-                    {
-                        if (symbol.Kind == SymbolKind.Property)
+                        foreach (var type in _knownTypes.ToList().Where(x => x.Name.StartsWith(word)))
                         {
-                            data.Add(new PropertyCompletionItem()
+                            if (type.Type.IsEnum)
                             {
-                                Class = symbol.Class,
-                                Description = symbol.Summary,
-                                Name = symbol.Name,
-                                Type = symbol.Type,
-                                Priority = 2,
-                            });
-                        }
-                        else if (symbol.Kind == SymbolKind.Field || symbol.Kind == SymbolKind.Local || symbol.Kind == SymbolKind.Parameter)
-                        {
-                            data.Add(new FieldCompletionItem()
+                                data.Add(new EnumCompletionItem()
+                                {
+                                    Namespace = type.Type.Namespace,
+                                    Description = type.Summary,
+                                    Name = type.FriendlyName,
+                                    Priority = 0,
+                                });
+                            }
+                            else if (type.Type.IsInterface)
                             {
-                                Class = symbol.Class,
-                                Description = symbol.Summary,
-                                Name = symbol.Name,
-                                Type = symbol.Type,
-                                Priority = 2,
-                            });
+                                data.Add(new InterfaceCompletionItem()
+                                {
+                                    Name = type.FriendlyName,
+                                    Description = type.Summary,
+                                    Namespace = type.Type.Namespace,
+                                    Priority = 0,
+                                });
+                            }
+                            else if (type.Type.IsValueType)
+                            {
+                                data.Add(new StructCompletionItem()
+                                {
+                                    Name = type.FriendlyName,
+                                    Description = type.Summary,
+                                    Namespace = type.Type.Namespace,
+                                    Priority = 0,
+                                });
+                            }
+                            else if (type.Type.IsClass)
+                            {
+                                data.Add(new ClassCompletionItem()
+                                {
+                                    Name = type.FriendlyName,
+                                    Description = type.Summary,
+                                    Namespace = type.Type.Namespace,
+                                    Priority = 0,
+                                });
+                            }
+                            else
+                            {
+                                throw new NotImplementedException("Implement generic item here.");
+                            }
                         }
-                        else if (symbol.Kind == SymbolKind.Method)
+
+                        foreach (var symbol in _parser.GetContextSymbols(Document.Text, CaretOffset).Where(x => x.Name.StartsWith(GetCurrentWord())))
                         {
-                            var methodCompletion = new MethodCompletionItem()
+                            if (symbol.Kind == SymbolKind.Property)
                             {
-                                Class = symbol.Class,
-                                Description = symbol.Summary,
-                                Name = symbol.Name,
-                                ReturnType = symbol.Type,
-                                Priority = 2,
-                            };
-
-                            for (int i = 0; i < symbol.Parameters.Count; i++)
+                                data.Add(new PropertyCompletionItem()
+                                {
+                                    Class = symbol.Class,
+                                    Description = symbol.Summary,
+                                    Name = symbol.Name,
+                                    Type = symbol.Type,
+                                    Priority = 2,
+                                });
+                            }
+                            else if (symbol.Kind == SymbolKind.Field || symbol.Kind == SymbolKind.Local || symbol.Kind == SymbolKind.Parameter)
                             {
-                                var pair = symbol.Parameters[i];
-
-                                methodCompletion.Parameters.Add(new KnownTypeMethodParameter()
+                                data.Add(new FieldCompletionItem()
                                 {
-                                    Type = pair.Key,
-                                    Name = pair.Value,
-                                    IsLast = (i == symbol.Parameters.Count - 1)
+                                    Class = symbol.Class,
+                                    Description = symbol.Summary,
+                                    Name = symbol.Name,
+                                    Type = symbol.Type,
+                                    Priority = 2,
                                 });
                             }
+                            else if (symbol.Kind == SymbolKind.Method)
+                            {
+                                var methodCompletion = new MethodCompletionItem()
+                                {
+                                    Class = symbol.Class,
+                                    Description = symbol.Summary,
+                                    Name = symbol.Name,
+                                    ReturnType = symbol.Type,
+                                    Priority = 2,
+                                };
+
+                                for (int i = 0; i < symbol.Parameters.Count; i++)
+                                {
+                                    var pair = symbol.Parameters[i];
 
-                            data.Add(methodCompletion);
+                                    methodCompletion.Parameters.Add(new KnownTypeMethodParameter()
+                                    {
+                                        Type = pair.Key,
+                                        Name = pair.Value,
+                                        IsLast = (i == symbol.Parameters.Count - 1)
+                                    });
+                                }
+
+                                data.Add(methodCompletion);
+                            }
                         }
-                    }
 
-                    ShowCompletionWindow(data, word);
+                        ShowCompletionWindow(data, word);
+                    }
                 }
             }
+            catch (Exception ex)
+            {
+                Debug.WriteLine(ex.ToString());
+            }
         }
 
         #endregion
@@ -792,7 +1075,7 @@ namespace Tango.Scripting.Editors
             IList<ICompletionData> data = completionWindow.CompletionList.CompletionData;
             data.Clear();
 
-            foreach (var item in suggestions)
+            foreach (var item in suggestions.DistinctBy(x => x.Text))
             {
                 data.Add(item);
             }
@@ -864,16 +1147,23 @@ namespace Tango.Scripting.Editors
             return list;
         }
 
-        private KnownType GetCurrentKnownType()
+        private KnownTypeResult GetCurrentKnownType()
         {
             var expression = GetPreviousWords().LastOrDefault();
             return GetKnownTypeFromExpression(expression);
         }
 
-        private KnownType GetKnownTypeFromExpression(String expression)
+        private KnownTypeResult GetKnownTypeFromExpression(String expression)
         {
             if (expression != null)
             {
+                var insideMethodExp = expression.Split('(').LastOrDefault();
+
+                if (insideMethodExp != null)
+                {
+                    expression = insideMethodExp;
+                }
+
                 var tree = expression.Split('.').Select(x => x.Remove(@"\n|\t|\r|\(.*\)|\[.*\]|\s")).ToList();
                 var variableName = tree.FirstOrDefault();
 
@@ -884,7 +1174,7 @@ namespace Tango.Scripting.Editors
 
                     if (enumType != null)
                     {
-                        return enumType;
+                        return new KnownTypeResult(enumType);
                     }
 
                     tree.RemoveAt(0);
@@ -893,7 +1183,8 @@ namespace Tango.Scripting.Editors
 
                     if (variable != null)
                     {
-                        var knownType = _knownTypes.FirstOrDefault(x => x.FriendlyName == Regex.Replace(variable.Type, "<.+>", "<T>"));
+                        var name = Regex.Replace(variable.Type, "<.+>", "<T>");
+                        var knownType = _knownTypes.FirstOrDefault(x => name == x.FriendlyName || name == x.Alias);
 
                         if (knownType != null)
                         {
@@ -911,9 +1202,37 @@ namespace Tango.Scripting.Editors
                                 knownType = _knownTypes.FirstOrDefault(x => x.Type.Namespace + "." + x.Type.Name == member.ReturnType.Namespace + "." + member.ReturnType.Name);
                             }
 
-                            return knownType;
+                            return new KnownTypeResult(knownType);
+                        }
+                        else //Maybe a variable of a declared type...
+                        {
+                            if (tree.Count > 0)
+                            {
+                                var memberName = tree[0];
+                                var declaredType = _declaredTypes.SingleOrDefault(x => x.Name == name);
+
+                                if (declaredType != null)
+                                {
+                                    var member = declaredType.Symbols.FirstOrDefault(x => x.Name == memberName);
+                                    if (member != null)
+                                    {
+                                        knownType = _knownTypes.SingleOrDefault(x => x.Name.ToLower() == member.Type.ToLower());
+
+                                        if (knownType != null)
+                                        {
+                                            return new KnownTypeResult(knownType);
+                                        }
+                                    }
+                                }
+                            }
                         }
                     }
+                    else
+                    {
+                        //Maybe static...
+                        var type = _knownTypes.FirstOrDefault(x => x.Name == variableName || x.Alias == variableName);
+                        return type != null ? new KnownTypeResult(type) { IsStatic = true } : null;
+                    }
                 }
             }
 
@@ -926,6 +1245,13 @@ namespace Tango.Scripting.Editors
 
             if (expression != null)
             {
+                var insideMethodExp = expression.Split('(').LastOrDefault();
+
+                if (insideMethodExp != null)
+                {
+                    expression = insideMethodExp;
+                }
+
                 var tree = expression.Split('.').Select(x => x.Remove(@"\n|\t|\r|\(.*\)|\[.*\]|\s")).ToList();
                 var variableName = tree.FirstOrDefault();
 
@@ -958,6 +1284,11 @@ namespace Tango.Scripting.Editors
                             return declaredType;
                         }
                     }
+                    else
+                    {
+                        //Maybe static...
+                        return _declaredTypes.FirstOrDefault(x => x.Name == variableName);
+                    }
                 }
             }
 
@@ -1047,7 +1378,7 @@ namespace Tango.Scripting.Editors
             foreach (var m in session.Type.Methods.Where(x => x.Name == session.MethodName))
             {
                 MethodDescription method = new MethodDescription();
-                method.ReturnType = session.Type.Name;
+                method.ReturnType = m.ReturnTypeFriendlyName;
                 method.Description = m.Summary;
                 method.Name = m.NameWithTypeArguments;
                 method.Class = session.Type.FriendlyName;
@@ -1140,33 +1471,364 @@ namespace Tango.Scripting.Editors
             return popup;
         }
 
-        private void InvalidateHighlighting()
+        public void LoadUsingsSymbols(List<Assembly> assemblies, List<String> usings)
+        {
+            lock (_loadUsingsLock)
+            {
+                LoadingSymbolsStarted?.Invoke(null, new EventArgs());
+
+                var allTypes = assemblies.SelectMany(x => x.GetTypes());
+
+                foreach (var use in usings)
+                {
+                    if (!_cachedUsings.Exists(x => x.Namespace == use))
+                    {
+                        if (!_isUsingsLoadingStarted)
+                        {
+                            _isUsingsLoadingStarted = true;
+                            UsingsLoadingStarted?.Invoke(this, new EventArgs());
+                        }
+
+                        var useFileName = System.IO.Path.Combine(KNOWN_TYPES_CACHE_FOLDER, use + ".json");
+
+                        if (File.Exists(useFileName))
+                        {
+                            LoadingSymbolsProgress?.Invoke(null, new TangoProgressChangedEventArgs<int>()
+                            {
+                                Progress = new TangoProgress<int>()
+                                {
+                                    IsIndeterminate = true,
+                                    Maximum = 100,
+                                    Message = $"Loading symbols for '{use}'..."
+                                }
+                            });
+
+                            CachedUsing cached = JsonConvert.DeserializeObject<CachedUsing>(File.ReadAllText(useFileName), _jsonSettings);
+                            _cachedUsings.Add(cached);
+                            foreach (var knownType in cached.KnownTypes)
+                            {
+                                _knownTypesCache.Add(knownType.Type, knownType);
+                            }
+
+                            KnownTypesAvailable?.Invoke(this, new EventArgs());
+                            InvalidateHighlightingPartial();
+
+                            continue;
+                        }
+
+                        var useTypes = allTypes.Where(x => x.IsVisible && x.IsPublic && x.Namespace == use).ToList();
+
+                        CachedUsing cachedUsing = new CachedUsing();
+                        cachedUsing.Namespace = use;
+                        _cachedUsings.Add(cachedUsing);
+
+                        int i = 1;
+
+                        foreach (var type in useTypes)
+                        {
+                            LoadingSymbolsProgress?.Invoke(null, new TangoProgressChangedEventArgs<int>()
+                            {
+                                Progress = new TangoProgress<int>()
+                                {
+                                    IsIndeterminate = false,
+                                    Maximum = useTypes.Count,
+                                    Value = i++,
+                                    Message = $"Loading symbols for '{use}'..."
+                                }
+                            });
+
+                            KnownType knownType = new KnownType(type);
+
+                            if (type.IsPrimitive)
+                            {
+                                if (type == typeof(Int32))
+                                {
+                                    knownType.Alias = "int";
+                                }
+                                else if (type == typeof(float))
+                                {
+                                    knownType.Alias = "float";
+                                }
+                                else if (type == typeof(Double))
+                                {
+                                    knownType.Alias = "double";
+                                }
+                                else if (type == typeof(long))
+                                {
+                                    knownType.Alias = "long";
+                                }
+                                else if (type == typeof(bool))
+                                {
+                                    knownType.Alias = "bool";
+                                }
+                                else if (type == typeof(uint))
+                                {
+                                    knownType.Alias = "uint";
+                                }
+                            }
+                            else if (type == typeof(String))
+                            {
+                                knownType.Alias = "string";
+                            }
+
+                            _knownTypesCache.Add(type, knownType);
+                            cachedUsing.KnownTypes.Add(knownType);
+                            knownType.LoadDocumentation();
+                        }
+
+                        if (!BlockedUsingsCache.Exists(x => use.StartsWith(x)))
+                        {
+                            Task.Factory.StartNew(() =>
+                            {
+                                var json = JsonConvert.SerializeObject(cachedUsing, _jsonSettings);
+                                File.WriteAllText(useFileName, json);
+                            });
+                        }
+                    }
+                }
+
+                if (_isUsingsLoadingStarted)
+                {
+                    UsingsLoadingCompleted?.Invoke(this, new EventArgs());
+                }
+
+                LoadingSymbolsCompleted?.Invoke(null, new EventArgs());
+            }
+        }
+
+        //public static void LoadCachedAssemblies(List<Assembly> assemblies, List<String> usings = null)
+        //{
+        //    if (_isLoadingCachedAssemblies) return;
+
+        //    _isLoadingCachedAssemblies = true;
+
+        //    LoadingSymbolsStarted?.Invoke(null, new EventArgs());
+
+        //    if (!_isCacheAssembliesLoaded)
+        //    {
+        //        foreach (var file in System.IO.Directory.GetFiles(KNOWN_TYPES_CACHE_FOLDER))
+        //        {
+        //            try
+        //            {
+        //                LoadingSymbolsProgress?.Invoke(null, new TangoProgressChangedEventArgs<int>()
+        //                {
+        //                    Progress = new TangoProgress<int>()
+        //                    {
+        //                        IsIndeterminate = true,
+        //                        Maximum = 100,
+        //                        Message = $"Loading metadata cache for '{System.IO.Path.GetFileName(file)}'..."
+        //                    }
+        //                });
+
+        //                var cachedAssembly = JsonConvert.DeserializeObject<CachedAssembly>(System.IO.File.ReadAllText(file), _jsonSettings);
+
+        //                foreach (var knownType in cachedAssembly.KnownTypes)
+        //                {
+        //                    _knownTypesCache.Add(knownType.Type, knownType);
+        //                }
+
+        //                _cachedAssemblies.Add(cachedAssembly);
+        //            }
+        //            catch { }
+        //        }
+
+        //        _isCacheAssembliesLoaded = true;
+        //    }
+
+        //    foreach (var asm in assemblies)
+        //    {
+        //        if (!_cachedAssemblies.Exists(x => x.Name == asm.FullName))
+        //        {
+        //            String asmFileName = System.IO.Path.GetFileName(asm.Location);
+
+        //            CachedAssembly cachedAssembly = new CachedAssembly();
+        //            cachedAssembly.Name = asm.FullName;
+        //            _cachedAssemblies.Add(cachedAssembly);
+
+        //            var types = asm.GetTypes().Where(x => x.IsVisible && x.IsPublic).ToList();
+
+        //            int i = 0;
+
+        //            foreach (var type in types)
+        //            {
+        //                LoadingSymbolsProgress?.Invoke(null, new TangoProgressChangedEventArgs<int>()
+        //                {
+        //                    Progress = new TangoProgress<int>()
+        //                    {
+        //                        IsIndeterminate = false,
+        //                        Maximum = types.Count,
+        //                        Value = i++,
+        //                        Message = $"Caching metadata for '{asmFileName}'..."
+        //                    }
+        //                });
+
+        //                KnownType knownType = new KnownType(type);
+
+        //                if (type.IsPrimitive)
+        //                {
+        //                    if (type == typeof(Int32))
+        //                    {
+        //                        knownType.Alias = "int";
+        //                    }
+        //                    else if (type == typeof(float))
+        //                    {
+        //                        knownType.Alias = "float";
+        //                    }
+        //                    else if (type == typeof(Double))
+        //                    {
+        //                        knownType.Alias = "double";
+        //                    }
+        //                    else if (type == typeof(long))
+        //                    {
+        //                        knownType.Alias = "long";
+        //                    }
+        //                    else if (type == typeof(bool))
+        //                    {
+        //                        knownType.Alias = "bool";
+        //                    }
+        //                    else if (type == typeof(uint))
+        //                    {
+        //                        knownType.Alias = "uint";
+        //                    }
+        //                }
+
+        //                _knownTypesCache.Add(type, knownType);
+        //                cachedAssembly.KnownTypes.Add(knownType);
+        //                //knownType.LoadDocumentation();
+        //            }
+
+        //            String cachedAssemblyFile = System.IO.Path.Combine(KNOWN_TYPES_CACHE_FOLDER, asmFileName);
+        //            File.WriteAllText(cachedAssemblyFile, JsonConvert.SerializeObject(cachedAssembly, _jsonSettings));
+        //        }
+        //    }
+
+        //    LoadingSymbolsCompleted?.Invoke(null, new EventArgs());
+
+        //    _isLoadingCachedAssemblies = false;
+        //}
+
+        private void InvalidateHighlightingPartial()
+        {
+            List<Assembly> assemblies = new List<Assembly>();
+            Dispatcher.Invoke(() =>
+            {
+                assemblies = ReferenceAssemblies.ToList();
+            });
+
+            var usings = _current_usings.ToList();
+
+            _knownTypes.Clear();
+
+            foreach (var knownType in _knownTypesCache.ToList().Select(x => x.Value).ToList())
+            {
+                if (usings.Exists(x => knownType.Type.Namespace == x) && assemblies.Exists(x => x == knownType.Type.Assembly))
+                {
+                    lock (_knownTypes)
+                    {
+                        _knownTypes.Add(knownType);
+                    }
+                }
+            }
+
+            if (_knownTypes.Count > 0 || _declaredTypes.Count > 0)
+            {
+                String text = String.Empty;
+
+                Stream xshd_stream = typeof(ScriptEditor).Assembly.GetManifestResourceStream("Tango.Scripting.Editors.Highlighting.Resources.CSharp-Mode.xshd");
+
+                using (StreamReader reader = new StreamReader(xshd_stream))
+                {
+                    text = reader.ReadToEnd();
+                }
+
+                List<String> referenceTypes = new List<string>();
+                List<String> interfaceTypes = new List<string>();
+
+                lock (_knownTypes)
+                {
+                    foreach (var type in _knownTypes.ToList().Where(x => x != null))
+                    {
+                        String name = type.Name;
+
+                        if (type.Type.ContainsGenericParameters)
+                        {
+                            name = new String(name.TakeWhile(x => x != '`').ToArray());
+                        }
+
+                        if (type.Type.IsInterface || type.Type.IsEnum)
+                        {
+                            interfaceTypes.Add(String.Format("<Word>{0}</Word>", name));
+                        }
+                        else if (type.Type.IsClass || (type.Type.IsValueType))
+                        {
+                            referenceTypes.Add(String.Format("<Word>{0}</Word>", name));
+                        }
+                    }
+                }
+
+                foreach (var type in _declaredTypes)
+                {
+                    if (type.Kind == TypeKind.Interface || type.Kind == TypeKind.Enum)
+                    {
+                        interfaceTypes.Add(String.Format("<Word>{0}</Word>", type.Name));
+                    }
+                    else if (type.Kind == TypeKind.Class)
+                    {
+                        referenceTypes.Add(String.Format("<Word>{0}</Word>", type.Name));
+                    }
+                }
+
+                if (referenceTypes.Count > 0)
+                {
+                    text = text.Replace("<Word>@ReferenceTypes@</Word>", String.Join(Environment.NewLine, referenceTypes.Distinct()));
+                }
+
+                if (interfaceTypes.Count > 0)
+                {
+                    text = text.Replace("<Word>@InterfaceTypes@</Word>", String.Join(Environment.NewLine, interfaceTypes.Distinct()));
+                }
+
+                MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(text));
+
+                XmlTextReader xshd_reader = new XmlTextReader(ms);
+
+                Dispatcher.Invoke(new Action(() =>
+                {
+                    SyntaxHighlighting = HighlightingLoader.Load(xshd_reader, HighlightingManager.Instance);
+                    xshd_reader.Close();
+                    ms.Dispose();
+                }));
+            }
+        }
+
+        public void InvalidateHighlighting(bool loadKnownTypes = true)
         {
             if (!_isLoadingTypes)
             {
                 _isLoadingTypes = true;
-                _knownTypes.Clear();
 
                 var assemblies = ReferenceAssemblies.ToList();
+                KnownType.ExtensionMethodsAssemblies = assemblies.ToList();
                 var usings = _current_usings.ToList();
 
                 Thread t = new Thread(() =>
                 {
-                    foreach (var asm in assemblies.Select(x => x.Assembly))
+                    LoadUsingsSymbols(assemblies, usings);
+
+                    if (loadKnownTypes)
                     {
-                        Parallel.ForEach(asm.GetTypes().Where(x => x.IsVisible && x.IsPublic && !x.IsPrimitive), (type) =>
+                        _knownTypes.Clear();
+
+                        foreach (var knownType in _knownTypesCache.ToList().Select(x => x.Value).ToList())
                         {
-                            if (usings.Exists(x => type.Namespace == x))
+                            if (usings.Exists(x => knownType.Type.Namespace == x) && assemblies.Exists(x => x == knownType.Type.Assembly))
                             {
                                 lock (_knownTypes)
                                 {
-                                    if (!_knownTypes.Exists(x => x.Type.FullName == type.FullName))
-                                    {
-                                        _knownTypes.Add(new KnownType(type));
-                                    }
+                                    _knownTypes.Add(knownType);
                                 }
                             }
-                        });
+                        }
                     }
 
                     if (_knownTypes.Count > 0 || _declaredTypes.Count > 0)
@@ -1239,10 +1901,10 @@ namespace Tango.Scripting.Editors
                         }));
 
 
-                        foreach (var knownType in _knownTypes)
-                        {
-                            knownType.LoadDocumentation();
-                        }
+                        //foreach (var knownType in _knownTypes)
+                        //{
+                        //    knownType.LoadDocumentation();
+                        //}
                     }
 
                     _isLoadingTypes = false;
@@ -1256,10 +1918,19 @@ namespace Tango.Scripting.Editors
         {
             var declaredTypes = _parser.GetDeclaredTypes(Text);
 
+            if (AdditionalScripts != null)
+            {
+                foreach (var script in AdditionalScripts)
+                {
+                    declaredTypes.AddRange(_parser.GetDeclaredTypes(script.Code));
+                }
+            }
+
+
             if (declaredTypes.Exists(x => !_declaredTypes.Exists(y => y.Name == x.Name)) || _declaredTypes.Exists(x => !declaredTypes.Exists(y => y.Name == x.Name)))
             {
                 _declaredTypes = declaredTypes;
-                InvalidateHighlighting();
+                InvalidateHighlighting(false);
             }
 
             _declaredTypes = declaredTypes;
@@ -1311,7 +1982,8 @@ namespace Tango.Scripting.Editors
 
         private void IndentCode()
         {
-            Text = Indentation.CSharp.CSharpIndentationHelper.IndentCSharpCode(Text);
+            Text = CodeFormatter.Format(Text);
+            //Text = Indentation.CSharp.CSharpIndentationHelper.IndentCSharpCode(Text);
             //Text = _parser.IndentCSharpCode(Text);
         }
 
@@ -1389,7 +2061,11 @@ namespace Tango.Scripting.Editors
 
         private ConstructionSession GetConstructionSession()
         {
-            var expression = _parser.GetCurrentConstructionExpression(GetCurrentLineText());
+            var currentLine = GetCurrentLineText();
+
+            //if (currentLine.Count(x => x == '(') > 1) return null;
+
+            var expression = _parser.GetCurrentConstructionExpression(currentLine);
 
             if (expression != null)
             {
@@ -1445,13 +2121,64 @@ namespace Tango.Scripting.Editors
 
                 }
             }
+            else
+            {
+                var expression2 = _parser.GetCurrentConstructionExpressionAlt(GetCurrentLineText());
+
+                if (expression2 != null && expression2.Identifier != null)
+                {
+                    ConstructionSession session = new ConstructionSession();
+
+                    var line = GetCurrentLine();
+                    int parameterIndex = 0;
+                    for (int i = CaretOffset; i > line.Offset; i--)
+                    {
+                        String c = Document.GetText(i, 1);
+
+                        if (c == "(")
+                        {
+                            KnownType type = null;
+
+                            if (expression2.Identifier != null)
+                            {
+                                var typeName = expression2.Identifier.ToString();
+                                type = _knownTypes.FirstOrDefault(x => x.Type.Name == typeName);
+
+                                if (type != null)
+                                {
+                                    session.Type = type;
+                                    session.ParameterIndex = parameterIndex;
+                                    return session;
+                                }
+                                else
+                                {
+                                    return null;
+                                }
+                            }
+                        }
+                        else if (c == ",")
+                        {
+                            parameterIndex++;
+                        }
+                    }
+                }
+            }
 
             return null;
         }
 
         private MethodSession GetMethodSession()
         {
-            var words = GetCurrentLineText().Split(' ');
+            var currentLine = GetCurrentLineText();
+
+            if (currentLine.Count(x => x == '(') > 1)
+            {
+                currentLine = currentLine.Split('(')[currentLine.Split('(').Length - 2];
+            }
+
+            currentLine = Regex.Replace(currentLine, "(?<=\")(.*?)(?=\")", string.Empty);
+
+            var words = currentLine.Split(' ');
 
             if (words.Count() > 0 && (words.First() == "private" || words.First() == "public" || words.First() == "void"))
             {
@@ -1463,6 +2190,8 @@ namespace Tango.Scripting.Editors
             if (expression != null)
             {
                 int parameterIndex = expression.Count(x => x == ',');
+
+
                 expression = new string(expression.TakeWhile(x => x != '(').ToArray());
 
                 var tree = expression.Split('.').Select(x => x.Remove(@"\n|\r|\s|\t|\(|\)|\[|\]|<.*>")).ToList();
@@ -1508,7 +2237,7 @@ namespace Tango.Scripting.Editors
             return null;
         }
 
-        private DeclaredMethodSession GetDeclaredMethodSession()
+        private MethodSession GetStaticMethodSession()
         {
             var words = GetCurrentLineText().Split(' ');
 
@@ -1517,7 +2246,73 @@ namespace Tango.Scripting.Editors
                 return null;
             }
 
-            var expression = GetPreviousWords().LastOrDefault();
+            var expression = words.LastOrDefault();
+
+            if (expression != null)
+            {
+                int parameterIndex = expression.Count(x => x == ',');
+                expression = new string(expression.TakeWhile(x => x != '(').ToArray());
+
+                var tree = expression.Split('.').Select(x => x.Remove(@"\n|\r|\s|\t|\(|\)|\[|\]|<.*>")).ToList();
+                var variableName = tree.FirstOrDefault();
+
+                if (variableName != null && tree.Count > 1)
+                {
+                    tree.RemoveAt(0);
+                    var variables = _parser.GetContextSymbols(Document.Text, CaretOffset);
+                    var variable = variableName;
+
+                    if (variable != null)
+                    {
+                        var knownType = _knownTypes.FirstOrDefault(x => x.FriendlyName == Regex.Replace(variable, "<.+>", "<T>"));
+
+                        if (knownType != null)
+                        {
+                            while (tree.Count > 1)
+                            {
+                                var memberName = tree.First();
+                                tree.RemoveAt(0);
+                                var member = knownType.Members.FirstOrDefault(x => x.Name == memberName);
+
+                                if (member == null)
+                                {
+                                    return null;
+                                }
+
+                                knownType = _knownTypes.FirstOrDefault(x => x.Type.Namespace + "." + x.Type.Name == member.ReturnType.Namespace + "." + member.ReturnType.Name);
+                            }
+
+                            return new MethodSession()
+                            {
+                                Type = knownType,
+                                MethodName = tree.Last(),
+                                ParameterIndex = parameterIndex,
+                            };
+                        }
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        private DeclaredMethodSession GetDeclaredMethodSession()
+        {
+            var currentLine = GetCurrentLineText();
+
+            if (currentLine.Count(x => x == '(') > 1)
+            {
+                currentLine = currentLine.Split('(')[currentLine.Split('(').Length - 2];
+            }
+
+            var words = currentLine.Split(' ');
+
+            if (words.Count() > 0 && (words.First() == "private" || words.First() == "public" || words.First() == "void"))
+            {
+                return null;
+            }
+
+            var expression = currentLine;
 
             if (expression != null)
             {
@@ -1532,7 +2327,7 @@ namespace Tango.Scripting.Editors
 
                     if (variable != null)
                     {
-                        var declaredType = _declaredTypes.FirstOrDefault(x => x.Name == Regex.Replace(variable.Class, "<.+>", "<T>"));
+                        var declaredType = _declaredTypes.FirstOrDefault(x => x.Name == Regex.Replace(variable.Type, "<.+>", "<T>"));
 
                         if (declaredType != null)
                         {
@@ -1591,5 +2386,413 @@ namespace Tango.Scripting.Editors
         }
 
         #endregion
+
+        #region Reference Assemblies Changed
+
+        private void OnReferenceAssembliesChanged()
+        {
+            if (ReferenceAssemblies != null)
+            {
+                ReferenceAssemblies.CollectionChanged -= ReferenceAssemblies_CollectionChanged;
+                ReferenceAssemblies.CollectionChanged += ReferenceAssemblies_CollectionChanged;
+
+                InvalidateHighlighting();
+            }
+        }
+
+        private void ReferenceAssemblies_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
+        {
+            InvalidateHighlighting();
+        }
+
+        #endregion
+
+        #region Public Methods
+
+        public void FormatCode()
+        {
+            try
+            {
+                int index = CaretOffset;
+                Document.BeginUpdate();
+                IndentCode();
+                Document.EndUpdate();
+                CaretOffset = index;
+            }
+            catch
+            {
+                Debug.WriteLine("Error formatting code.");
+            }
+        }
+
+        public void Highlight(int position, int length, int line)
+        {
+            Select(position, Math.Max(length, 1));
+            ScrollToLine(line);
+        }
+
+        public void InsertCode(String code)
+        {
+            Document.Insert(TextArea.Caret.Offset, code);
+        }
+
+        public int Find(String text)
+        {
+            if (String.IsNullOrEmpty(text)) return -1;
+
+            string txt = Document.Text;
+            int index = txt.IndexOf(text, TextArea.Caret.Offset);
+
+            if (index > -1)
+            {
+                Select(index, text.Length);
+                ScrollToLine(TextArea.Selection.StartPosition.Line);
+            }
+            else
+            {
+                index = txt.IndexOf(text, 0);
+
+                if (index > -1)
+                {
+                    Select(index, text.Length);
+                    ScrollToLine(TextArea.Selection.StartPosition.Line);
+                }
+                else
+                {
+                    Select(0, 0);
+                    System.Media.SystemSounds.Beep.Play();
+                }
+            }
+
+            return index;
+        }
+
+        public int ReplaceNext(String text, String replace)
+        {
+            if (String.IsNullOrEmpty(text)) return -1;
+
+            String selectedText = TextArea.Selection.GetText();
+
+            if (selectedText == text)
+            {
+                TextArea.Selection.ReplaceSelectionWithText(replace);
+            }
+
+            return Find(text);
+        }
+
+        public int ReplaceAll(String text, String replace)
+        {
+            int counter = 0;
+
+            Select(0, 0);
+
+            while (ReplaceNext(text, replace) > -1)
+            {
+                counter++;
+            };
+
+            return counter;
+        }
+
+        public void ColorizeByKeyword(String text)
+        {
+            ResetColorizationByKeyword();
+
+            if (String.IsNullOrEmpty(text)) return;
+
+            var txt = Document.Text;
+
+            var indexes = txt.AllIndexesOf(text).ToList();
+
+            foreach (var index in indexes)
+            {
+                Document.BeginUpdate();
+
+                var line = Document.GetLineByOffset(index);
+
+                OffsetColorizer colorizer = new OffsetColorizer(line, index, index + text.Length, ColorizeBrush);
+                TextArea.TextView.LineTransformers.Add(colorizer);
+
+                Document.EndUpdate();
+            }
+        }
+
+        public void ResetColorizationByKeyword()
+        {
+            Document.BeginUpdate();
+
+            for (int i = 0; i < TextArea.TextView.LineTransformers.Count; i++)
+            {
+                if (TextArea.TextView.LineTransformers[i] is OffsetColorizer)
+                {
+                    TextArea.TextView.LineTransformers.RemoveAt(i);
+                    i--;
+                }
+            }
+
+            Document.EndUpdate();
+        }
+
+        public void HighlighError(int position, int length)
+        {
+            try
+            {
+                ITextMarker marker = errorMarkerService.Create(position, length);
+                marker.MarkerTypes = TextMarkerTypes.SquigglyUnderline;
+                marker.MarkerColor = Colors.Red;
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"Error highlighting script error.\n{ex.ToString()}");
+            }
+        }
+
+        public void ClearErrors()
+        {
+            errorMarkerService.RemoveAll(m => true);
+        }
+
+        public void HighlightErrorLine(int lineNumber)
+        {
+            Document.BeginUpdate();
+
+            var line = Document.GetLineByNumber(lineNumber);
+            OffsetColorizer errorLineColrizer = new OffsetColorizer(line, line.Offset, line.EndOffset, ErrorLineBrush);
+            TextArea.TextView.LineTransformers.Add(errorLineColrizer);
+
+            Document.EndUpdate();
+        }
+
+        public void HighlightDebugLine(int lineNumber)
+        {
+            Document.BeginUpdate();
+
+            var line = Document.GetLineByNumber(lineNumber);
+            OffsetColorizer errorLineColrizer = new OffsetColorizer(line, line.Offset, line.EndOffset, DebugLineBrush);
+            TextArea.TextView.LineTransformers.Add(errorLineColrizer);
+
+            Document.EndUpdate();
+        }
+
+        public void HighlightBreakPoint(int lineNumber, List<ScriptBreakPointSymbol> symbols)
+        {
+            _breakPointLineNumber = lineNumber;
+            _breakPointSymbols = symbols.ToList();
+            _currentBreakPointSymbol = null;
+
+            Document.BeginUpdate();
+
+            var line = Document.GetLineByNumber(lineNumber);
+            OffsetColorizer errorLineColrizer = new OffsetColorizer(line, line.Offset, line.EndOffset, BreakPointLineBrush);
+            TextArea.TextView.LineTransformers.Add(errorLineColrizer);
+
+            var breakPoint = breakPointMargin.BreakPoints.FirstOrDefault(x => x.LineNumber == lineNumber);
+            breakPoint.IsActive = true;
+            breakPointMargin.InvalidateVisual();
+
+            Document.EndUpdate();
+        }
+
+        public void ResetBreakPointLine()
+        {
+            _breakPointSymbols = new List<ScriptBreakPointSymbol>();
+            _currentBreakPointSymbol = null;
+            ResetColorizationByKeyword();
+            breakPointMargin.BreakPoints.ToList().ForEach(x => x.IsActive = false);
+            Mouse.OverrideCursor = null;
+            ClearErrors();
+            breakPointMargin.InvalidateVisual();
+        }
+
+        public Point? GetLineVisualPosition(int lineNumber)
+        {
+            double top = TextArea.TextView.GetVisualTopByDocumentLine(lineNumber);
+            var visualLine = TextArea.TextView.GetVisualLine(lineNumber);
+
+            if (visualLine != null)
+            {
+                var textLine = visualLine.GetTextLine(0);
+                var x = visualLine.GetTextLineVisualXPosition(textLine, visualLine.VisualLengthWithEndOfLineMarker);
+                var left = visualLine.VisualLengthWithEndOfLineMarker;
+                return new Point(x, top);
+            }
+
+            return null;
+        }
+
+        public List<ScriptBreakPoint> GetBreakPoints()
+        {
+            List<ScriptBreakPoint> breakPoints = new List<ScriptBreakPoint>();
+
+            foreach (var b in breakPointMargin.BreakPoints)
+            {
+                ScriptBreakPoint breakPoint = new ScriptBreakPoint();
+                breakPoint.Script = ScriptSource;
+                breakPoint.LineNumber = b.LineNumber;
+
+                var line = Document.GetLineByNumber(b.LineNumber);
+                breakPoint.LineStartOffset = line.Offset;
+                breakPoint.LineEndOffset = line.EndOffset;
+
+                var symbols = _parser.GetContextSymbols(Document.Text, line.Offset);
+
+                foreach (var symbol in symbols.Where(x => (x.Kind == SymbolKind.Property || x.Kind == SymbolKind.Field || x.Kind == SymbolKind.Local || x.Kind == SymbolKind.Parameter) && !x.IsUnassigned))
+                {
+                    if (symbol.Offset < line.Offset)
+                    {
+                        breakPoint.ContextSymbols.Add(new ScriptBreakPointSymbol()
+                        {
+                            Name = symbol.Name,
+                            Offset = symbol.Offset,
+                            Length = symbol.Length,
+                        });
+                    }
+                }
+
+                breakPoints.Add(breakPoint);
+            }
+
+            return breakPoints;
+        }
+
+        #endregion
+
+        #region BreakPoint Symbols Search
+
+        private void ScriptEditor_MouseMove(object sender, MouseEventArgs e)
+        {
+            if (IsReadOnly && _breakPointSymbols.Count > 0)
+            {
+                try
+                {
+                    var word_separators_plus = word_separators.ToList();
+                    word_separators_plus.Add(')');
+                    word_separators_plus.Add(';');
+
+                    var textView = TextArea.TextView;
+                    Point position = e.GetPosition(textView);
+                    position.Y += textView.VerticalOffset;
+                    VisualLine visualLine = textView.GetVisualLineFromVisualTop(position.Y);
+                    int columnIndex = visualLine.GetVisualColumnFloor(position, false);
+                    String line = Document.GetText(visualLine.FirstDocumentLine.Offset, visualLine.FirstDocumentLine.Length);
+                    if (columnIndex < line.Length)
+                    {
+                        int wordStartIndex = columnIndex;
+                        int wordEndIndex = columnIndex;
+
+                        while (wordStartIndex > 0)
+                        {
+                            if (word_separators_plus.Contains(line[wordStartIndex])) break;
+                            wordStartIndex--;
+                        }
+
+                        while (wordEndIndex < line.Length)
+                        {
+                            if (word_separators_plus.Contains(line[wordEndIndex])) break;
+                            wordEndIndex++;
+                        }
+
+                        if (wordStartIndex > 0)
+                        {
+                            wordStartIndex++;
+                        }
+
+                        String word = line.Substring(wordStartIndex, wordEndIndex - wordStartIndex);
+
+                        var breakPointSymbol = _breakPointSymbols.FirstOrDefault(x => x.Name == word);
+
+                        if (breakPointSymbol != null)
+                        {
+                            int wordStartOffset = visualLine.FirstDocumentLine.Offset + wordStartIndex;
+
+                            ClearErrors();
+                            ITextMarker marker = errorMarkerService.Create(wordStartOffset, word.Length);
+                            marker.MarkerTypes = TextMarkerTypes.NormalUnderline;
+                            marker.MarkerColor = Colors.Yellow;
+                            Mouse.OverrideCursor = Cursors.Hand;
+
+                            _currentBreakPointSymbol = breakPointSymbol;
+                            _currentBreakPointSymbolPosition = visualLine.GetVisualPosition(wordEndIndex, VisualYPosition.LineTop);
+                        }
+                        else
+                        {
+                            _currentBreakPointSymbol = null;
+                            Mouse.OverrideCursor = null;
+                            ClearErrors();
+                        }
+                    }
+                    else
+                    {
+                        _currentBreakPointSymbol = null;
+                        Mouse.OverrideCursor = null;
+                        ClearErrors();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _currentBreakPointSymbol = null;
+                    Mouse.OverrideCursor = null;
+                    ClearErrors();
+                    Debug.WriteLine(ex.Message);
+                }
+            }
+        }
+
+        protected override void OnPreviewMouseLeftButtonUp(MouseButtonEventArgs e)
+        {
+            base.OnPreviewMouseLeftButtonUp(e);
+
+            if (_currentBreakPointSymbol != null)
+            {
+                Mouse.OverrideCursor = null;
+                Debug.WriteLine($"Pressed on break point symbol: {_currentBreakPointSymbol.Name}");
+                BreakPointSymbolPressed?.Invoke(this, new BreakPointSymbolPressedEventArgs()
+                {
+                    BreakPointSymbol = _currentBreakPointSymbol,
+                    Position = _currentBreakPointSymbolPosition
+                });
+            }
+        }
+
+        public String GetCaretWord()
+        {
+            try
+            {
+                var word_separators_plus = word_separators.ToList();
+                word_separators_plus.Add(')');
+                word_separators_plus.Add(';');
+
+                int wordStartOffset = CaretOffset;
+                int wordEndOffset = CaretOffset;
+
+                while (wordStartOffset > 0)
+                {
+                    if (word_separators_plus.Contains(Document.Text[wordStartOffset])) break;
+                    wordStartOffset--;
+                }
+
+                while (wordEndOffset < Document.Text.Length)
+                {
+                    if (word_separators_plus.Contains(Document.Text[wordEndOffset])) break;
+                    wordEndOffset++;
+                }
+
+                if (wordStartOffset > 0)
+                {
+                    wordStartOffset++;
+                }
+
+                String word = Document.Text.Substring(wordStartOffset, wordEndOffset - wordStartOffset);
+
+                return word;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        #endregion
     }
 }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors.csproj
index ce7c361e3..11e023f86 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors.csproj
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors.csproj
@@ -77,6 +77,9 @@
     <Reference Include="Microsoft.CodeAnalysis.CSharp, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.dll</HintPath>
     </Reference>
+    <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
     <Reference Include="PresentationCore">
       <RequiredTargetFramework>3.0</RequiredTargetFramework>
     </Reference>
@@ -177,6 +180,9 @@
       <Link>GlobalVersionInfo.cs</Link>
     </Compile>
     <Compile Include="AvalonEditCommands.cs" />
+    <Compile Include="BreakPointSymbolPressedEventArgs.cs" />
+    <Compile Include="CachedAssembly.cs" />
+    <Compile Include="CachedUsing.cs" />
     <Compile Include="CodeCompletion\CompletionListBox.cs" />
     <Compile Include="CodeCompletion\CompletionListBoxItem.cs" />
     <Compile Include="CodeCompletion\CompletionWindowBase.cs" />
@@ -191,14 +197,19 @@
     <Compile Include="CodeCompletion\OverloadViewer.cs" />
     <Compile Include="Converters\BooleanToVisibilityConverter.cs" />
     <Compile Include="Converters\BooleanToVisibilityInversedConverter.cs" />
+    <Compile Include="Editing\BreakPointMargin.cs" />
+    <Compile Include="Errors\ITextMarker.cs" />
+    <Compile Include="Errors\TextMarkerService.cs" />
     <Compile Include="ExtensionMethods.cs" />
     <Compile Include="Intellisense\ClassCompletionItemPopup.cs" />
     <Compile Include="Intellisense\CompletionItem.cs" />
     <Compile Include="Intellisense\CompletionItemPopupControl.cs" />
     <Compile Include="Intellisense\EnumCompletionItem.cs" />
     <Compile Include="Intellisense\EnumCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\EventCompletionItem.cs" />
     <Compile Include="Intellisense\FieldCompletionItem.cs" />
     <Compile Include="Intellisense\FieldCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\HideIntellisenseAttribute.cs" />
     <Compile Include="Intellisense\ICompletionItem.cs" />
     <Compile Include="Intellisense\ICompletionProvider.cs" />
     <Compile Include="Intellisense\InterfaceCompletionItem.cs" />
@@ -336,6 +347,7 @@
     <Compile Include="Indentation\DefaultIndentationStrategy.cs" />
     <Compile Include="Indentation\IIndentationStrategy.cs" />
     <Compile Include="Intellisense\KnownTypeConstructor.cs" />
+    <Compile Include="Intellisense\KnownTypeEvent.cs" />
     <Compile Include="Intellisense\KnownTypeField.cs" />
     <Compile Include="Intellisense\KnownTypeMember.cs" />
     <Compile Include="Intellisense\KnownTypeMethodParameter.cs" />
@@ -348,6 +360,7 @@
     <Compile Include="Intellisense\NamespaceCompletionItemPopup.cs" />
     <Compile Include="Intellisense\PropertyCompletionItem.cs" />
     <Compile Include="Intellisense\PropertyCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\SnippetCompletionItem.cs" />
     <Compile Include="Intellisense\StructCompletionItem.cs" />
     <Compile Include="Intellisense\StructCompletionItemPopup.cs" />
     <Compile Include="Intellisense\Utils.cs" />
@@ -500,6 +513,7 @@
     <Compile Include="Utils\ThrowUtil.cs" />
     <Compile Include="Utils\Win32.cs" />
     <CodeAnalysisDictionary Include="Properties\CodeAnalysisDictionary.xml" />
+    <Compile Include="XamlEditor.cs" />
     <Compile Include="Xml\AbstractAXmlVisitor.cs" />
     <Compile Include="Xml\AXmlAttribute.cs" />
     <Compile Include="Xml\AXmlAttributeCollection.cs" />
@@ -579,6 +593,14 @@
       <Project>{a34ee0f0-649d-41c8-8489-b6f1cc6924ee}</Project>
       <Name>Tango.Core</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Core\Tango.Scripting.Core.csproj">
+      <Project>{5812E1C6-ABAA-4066-94AC-971C27B4F46A}</Project>
+      <Name>Tango.Scripting.Core</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Formatting\Tango.Scripting.Formatting.csproj">
+      <Project>{8d8f06ed-7f75-4933-b0c5-829b0ff654d0}</Project>
+      <Name>Tango.Scripting.Formatting</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Tango.Scripting\Tango.Scripting.csproj">
       <Project>{1e938fd2-c669-4738-98c9-77f96ce4d451}</Project>
       <Name>Tango.Scripting</Name>
@@ -626,9 +648,18 @@
     <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.Analyzers.dll" />
     <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.CSharp.Analyzers.dll" />
   </ItemGroup>
+  <ItemGroup>
+    <Resource Include="Images\event.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="Images\snippet.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="Images\break_point_arrow.png" />
+  </ItemGroup>
   <ProjectExtensions>
     <VisualStudio>
-      <UserProperties BuildVersion_UseGlobalSettings="True" BuildVersion_AssemblyInfoFilename="Properties\AssemblyInfo.cs" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_BuildVersioningStyle="None.None.Increment.TimeStamp" BuildVersion_StartDate="2000/1/1" />
+      <UserProperties BuildVersion_StartDate="2000/1/1" BuildVersion_BuildVersioningStyle="None.None.Increment.TimeStamp" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_AssemblyInfoFilename="Properties\AssemblyInfo.cs" BuildVersion_UseGlobalSettings="True" />
     </VisualStudio>
   </ProjectExtensions>
 </Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors_di35u2uj_wpftmp.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors_di35u2uj_wpftmp.csproj
new file mode 100644
index 000000000..70a4840c4
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Tango.Scripting.Editors_di35u2uj_wpftmp.csproj
@@ -0,0 +1,628 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <ProjectGuid>{DA62FA39-668B-47A6-B0F2-D2C1DAF777B0}</ProjectGuid>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <OutputType>Library</OutputType>
+    <RootNamespace>Tango.Scripting.Editors</RootNamespace>
+    <AssemblyName>Tango.Scripting.Editors</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <SourceAnalysisOverrideSettingsFile>"C:\Program Files\SharpDevelop\3.0\bin\..\AddIns\AddIns\Misc\SourceAnalysis\Settings.SourceAnalysis"</SourceAnalysisOverrideSettingsFile>
+    <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
+    <NoStdLib>False</NoStdLib>
+    <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
+    <SignAssembly>false</SignAssembly>
+    <AssemblyOriginatorKeyFile>ICSharpCode.AvalonEdit.snk</AssemblyOriginatorKeyFile>
+    <DelaySign>False</DelaySign>
+    <AssemblyOriginatorKeyMode>File</AssemblyOriginatorKeyMode>
+    <RunCodeAnalysis>False</RunCodeAnalysis>
+    <CodeAnalysisRules>-Microsoft.Design#CA1020;-Microsoft.Design#CA1033;-Microsoft.Performance#CA1805;-Microsoft.Performance#CA1810</CodeAnalysisRules>
+    <OutputPath>..\bin\$(Configuration)</OutputPath>
+    <DocumentationFile>..\bin\$(Configuration)\ICSharpCode.AvalonEdit.xml</DocumentationFile>
+    <NoWarn>1607</NoWarn>
+    <TargetFrameworkProfile>
+    </TargetFrameworkProfile>
+    <SccProjectName>SAK</SccProjectName>
+    <SccLocalPath>SAK</SccLocalPath>
+    <SccAuxPath>SAK</SccAuxPath>
+    <SccProvider>SAK</SccProvider>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>Full</DebugType>
+    <Optimize>False</Optimize>
+    <CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>
+    <DefineConstants>DEBUG;TRACE;DOTNET4</DefineConstants>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+    <DebugSymbols>false</DebugSymbols>
+    <DebugType>PdbOnly</DebugType>
+    <Optimize>True</Optimize>
+    <CheckForOverflowUnderflow>False</CheckForOverflowUnderflow>
+    <DefineConstants>TRACE;DOTNET4</DefineConstants>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Platform)' == 'AnyCPU' ">
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <GenerateSerializationAssemblies>Auto</GenerateSerializationAssemblies>
+    <BaseAddress>4194304</BaseAddress>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <FileAlignment>4096</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'">
+    <OutputPath>..\..\Build\Scripting\Debug\</OutputPath>
+    <DocumentationFile>
+    </DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
+    <DefineConstants>TRACE;DEBUG</DefineConstants>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|AnyCPU'">
+    <Prefer32Bit>false</Prefer32Bit>
+    <OutputPath>..\..\Build\Scripting\Release\</OutputPath>
+    <DocumentationFile />
+  </PropertyGroup>
+  <PropertyGroup>
+    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+  </PropertyGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
+  <ItemGroup>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\..\Versioning\GlobalVersionInfo.cs">
+      <Link>GlobalVersionInfo.cs</Link>
+    </Compile>
+    <Compile Include="AvalonEditCommands.cs" />
+    <Compile Include="CachedAssembly.cs" />
+    <Compile Include="CachedUsing.cs" />
+    <Compile Include="CodeCompletion\CompletionListBox.cs" />
+    <Compile Include="CodeCompletion\CompletionListBoxItem.cs" />
+    <Compile Include="CodeCompletion\CompletionWindowBase.cs" />
+    <Compile Include="CodeCompletion\CompletionList.cs" />
+    <Compile Include="CodeCompletion\CompletionWindow.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="CodeCompletion\ICompletionData.cs" />
+    <Compile Include="CodeCompletion\InsightWindow.cs" />
+    <Compile Include="CodeCompletion\IOverloadProvider.cs" />
+    <Compile Include="CodeCompletion\OverloadInsightWindow.cs" />
+    <Compile Include="CodeCompletion\OverloadViewer.cs" />
+    <Compile Include="Converters\BooleanToVisibilityConverter.cs" />
+    <Compile Include="Converters\BooleanToVisibilityInversedConverter.cs" />
+    <Compile Include="Editing\BreakPoint.cs" />
+    <Compile Include="Editing\BreakPointMargin.cs" />
+    <Compile Include="Errors\ITextMarker.cs" />
+    <Compile Include="Errors\TextMarkerService.cs" />
+    <Compile Include="ExtensionMethods.cs" />
+    <Compile Include="Intellisense\ClassCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\CompletionItem.cs" />
+    <Compile Include="Intellisense\CompletionItemPopupControl.cs" />
+    <Compile Include="Intellisense\EnumCompletionItem.cs" />
+    <Compile Include="Intellisense\EnumCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\EventCompletionItem.cs" />
+    <Compile Include="Intellisense\FieldCompletionItem.cs" />
+    <Compile Include="Intellisense\FieldCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\ICompletionItem.cs" />
+    <Compile Include="Intellisense\ICompletionProvider.cs" />
+    <Compile Include="Intellisense\InterfaceCompletionItem.cs" />
+    <Compile Include="Intellisense\InterfaceCompletionItemPopup.cs" />
+    <Compile Include="Intellisense\KnownType.cs" />
+    <Compile Include="Document\ChangeTrackingCheckpoint.cs" />
+    <Compile Include="Document\DocumentChangeOperation.cs">
+      <DependentUpon>UndoStack.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\ILineTracker.cs" />
+    <Compile Include="Document\ISegment.cs" />
+    <Compile Include="Document\ITextSource.cs" />
+    <Compile Include="Document\IUndoableOperation.cs">
+      <DependentUpon>UndoStack.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\LineNode.cs">
+      <DependentUpon>DocumentLine.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\NewLineFinder.cs" />
+    <Compile Include="Document\OffsetChangeMap.cs" />
+    <Compile Include="Document\TextDocumentWeakEventManager.cs">
+      <DependentUpon>TextDocument.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\TextSegmentCollection.cs" />
+    <Compile Include="Document\TextAnchor.cs" />
+    <Compile Include="Document\TextAnchorNode.cs">
+      <DependentUpon>TextAnchor.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\TextAnchorTree.cs">
+      <DependentUpon>TextAnchor.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\TextLocation.cs" />
+    <Compile Include="Document\TextSegment.cs" />
+    <Compile Include="Document\TextUtilities.cs" />
+    <Compile Include="Document\UndoOperationGroup.cs">
+      <DependentUpon>UndoStack.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Document\UndoStack.cs">
+    </Compile>
+    <Compile Include="Document\WeakLineTracker.cs">
+      <DependentUpon>ILineTracker.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Editing\AbstractMargin.cs" />
+    <Compile Include="Editing\Caret.cs" />
+    <Compile Include="Editing\CaretLayer.cs">
+    </Compile>
+    <Compile Include="Editing\CaretNavigationCommandHandler.cs">
+    </Compile>
+    <Compile Include="Editing\CaretWeakEventHandler.cs" />
+    <Compile Include="Editing\DottedLineMargin.cs" />
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+    <ReferencePath Include="C:\DATA\Development\Tango\Software\Visual_Studio\Scripting\Tango.Scripting.Core\bin\Debug\Tango.Scripting.Core.dll" />
+    <ReferencePath Include="C:\DATA\Development\Tango\Software\Visual_Studio\Build\Scripting\Debug\Tango.Scripting.dll" />
+    <ReferencePath Include="C:\DATA\Development\Tango\Software\Visual_Studio\Scripting\Tango.Scripting.Formatting\bin\Debug\Tango.Scripting.Formatting.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\UIAutomationProvider.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\UIAutomationTypes.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\WindowsBase.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Collections.Concurrent.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Collections.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.ComponentModel.Annotations.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.ComponentModel.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.ComponentModel.EventBasedAsync.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Diagnostics.Contracts.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Diagnostics.Debug.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Diagnostics.Tools.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Diagnostics.Tracing.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Dynamic.Runtime.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Globalization.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.IO.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Linq.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Linq.Expressions.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Linq.Parallel.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Linq.Queryable.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Net.NetworkInformation.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.ObjectModel.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Reflection.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Reflection.Emit.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Reflection.Emit.ILGeneration.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Reflection.Emit.Lightweight.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Runtime.InteropServices.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Runtime.Numerics.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.ServiceModel.Duplex.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Threading.dll" />
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+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Threading.Tasks.Parallel.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Threading.Timer.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Xml.XDocument.dll" />
+    <ReferencePath Include="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\Facades\System.Xml.XmlSerializer.dll" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="C:\DATA\Development\Tango\Software\Visual_Studio\Scripting\Tango.Scripting.Editors\obj\Debug\GeneratedInternalTypeHelper.g.cs" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/TextEditor.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/TextEditor.cs
index d2fc9e02b..cd9977520 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/TextEditor.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/TextEditor.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Text;
@@ -24,1121 +25,1229 @@ using Tango.Scripting.Editors.Utils;
 
 namespace Tango.Scripting.Editors
 {
-	/// <summary>
-	/// The text editor control.
-	/// Contains a scrollable TextArea.
-	/// </summary>
-	[Localizability(LocalizationCategory.Text), ContentProperty("Text")]
-	public class TextEditor : Control, ITextEditorComponent, IServiceProvider, IWeakEventListener
-	{
-		#region Constructors
-		static TextEditor()
-		{
-			DefaultStyleKeyProperty.OverrideMetadata(typeof(TextEditor),
-			                                         new FrameworkPropertyMetadata(typeof(TextEditor)));
-			FocusableProperty.OverrideMetadata(typeof(TextEditor),
-			                                   new FrameworkPropertyMetadata(Boxes.True));
-		}
-		
-		/// <summary>
-		/// Creates a new TextEditor instance.
-		/// </summary>
-		public TextEditor() : this(new TextArea())
-		{
-		}
-		
-		/// <summary>
-		/// Creates a new TextEditor instance.
-		/// </summary>
-		protected TextEditor(TextArea textArea)
-		{
-			if (textArea == null)
-				throw new ArgumentNullException("textArea");
-			this.textArea = textArea;
-			
-			textArea.TextView.Services.AddService(typeof(TextEditor), this);
-			
-			SetCurrentValue(OptionsProperty, textArea.Options);
-			SetCurrentValue(DocumentProperty, new TextDocument());
-		}
-		
-		#endregion
-		
-		/// <inheritdoc/>
-		protected override System.Windows.Automation.Peers.AutomationPeer OnCreateAutomationPeer()
-		{
-			return new TextEditorAutomationPeer(this);
-		}
-		
-		/// Forward focus to TextArea.
-		/// <inheritdoc/>
-		protected override void OnGotKeyboardFocus(KeyboardFocusChangedEventArgs e)
-		{
-			base.OnGotKeyboardFocus(e);
-			if (e.NewFocus == this) {
-				Keyboard.Focus(this.TextArea);
-				e.Handled = true;
-			}
-		}
-		
-		#region Document property
-		/// <summary>
-		/// Document property.
-		/// </summary>
-		public static readonly DependencyProperty DocumentProperty
-			= TextView.DocumentProperty.AddOwner(
-				typeof(TextEditor), new FrameworkPropertyMetadata(OnDocumentChanged));
-		
-		/// <summary>
-		/// Gets/Sets the document displayed by the text editor.
-		/// This is a dependency property.
-		/// </summary>
-		public TextDocument Document {
-			get { return (TextDocument)GetValue(DocumentProperty); }
-			set { SetValue(DocumentProperty, value); }
-		}
-		
-		/// <summary>
-		/// Occurs when the document property has changed.
-		/// </summary>
-		public event EventHandler DocumentChanged;
-		
-		/// <summary>
-		/// Raises the <see cref="DocumentChanged"/> event.
-		/// </summary>
-		protected virtual void OnDocumentChanged(EventArgs e)
-		{
-			if (DocumentChanged != null) {
-				DocumentChanged(this, e);
-			}
-		}
-		
-		static void OnDocumentChanged(DependencyObject dp, DependencyPropertyChangedEventArgs e)
-		{
-			((TextEditor)dp).OnDocumentChanged((TextDocument)e.OldValue, (TextDocument)e.NewValue);
-		}
-		
-		void OnDocumentChanged(TextDocument oldValue, TextDocument newValue)
-		{
-			if (oldValue != null) {
-				TextDocumentWeakEventManager.TextChanged.RemoveListener(oldValue, this);
-				PropertyChangedEventManager.RemoveListener(oldValue.UndoStack, this, "IsOriginalFile");
-			}
-			textArea.Document = newValue;
-			if (newValue != null) {
-				TextDocumentWeakEventManager.TextChanged.AddListener(newValue, this);
-				PropertyChangedEventManager.AddListener(newValue.UndoStack, this, "IsOriginalFile");
-			}
-			OnDocumentChanged(EventArgs.Empty);
-			OnTextChanged(EventArgs.Empty);
-		}
-		#endregion
-		
-		#region Options property
-		/// <summary>
-		/// Options property.
-		/// </summary>
-		public static readonly DependencyProperty OptionsProperty
-			= TextView.OptionsProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(OnOptionsChanged));
-		
-		/// <summary>
-		/// Gets/Sets the options currently used by the text editor.
-		/// </summary>
-		public TextEditorOptions Options {
-			get { return (TextEditorOptions)GetValue(OptionsProperty); }
-			set { SetValue(OptionsProperty, value); }
-		}
-		
-		/// <summary>
-		/// Occurs when a text editor option has changed.
-		/// </summary>
-		public event PropertyChangedEventHandler OptionChanged;
-		
-		/// <summary>
-		/// Raises the <see cref="OptionChanged"/> event.
-		/// </summary>
-		protected virtual void OnOptionChanged(PropertyChangedEventArgs e)
-		{
-			if (OptionChanged != null) {
-				OptionChanged(this, e);
-			}
-		}
-		
-		static void OnOptionsChanged(DependencyObject dp, DependencyPropertyChangedEventArgs e)
-		{
-			((TextEditor)dp).OnOptionsChanged((TextEditorOptions)e.OldValue, (TextEditorOptions)e.NewValue);
-		}
-		
-		void OnOptionsChanged(TextEditorOptions oldValue, TextEditorOptions newValue)
-		{
-			if (oldValue != null) {
-				PropertyChangedWeakEventManager.RemoveListener(oldValue, this);
-			}
-			textArea.Options = newValue;
-			if (newValue != null) {
-				PropertyChangedWeakEventManager.AddListener(newValue, this);
-			}
-			OnOptionChanged(new PropertyChangedEventArgs(null));
-		}
-		
-		/// <inheritdoc cref="IWeakEventListener.ReceiveWeakEvent"/>
-		protected virtual bool ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
-		{
-			if (managerType == typeof(PropertyChangedWeakEventManager)) {
-				OnOptionChanged((PropertyChangedEventArgs)e);
-				return true;
-			} else if (managerType == typeof(TextDocumentWeakEventManager.TextChanged)) {
-				OnTextChanged(e);
-				return true;
-			} else if (managerType == typeof(PropertyChangedEventManager)) {
-				return HandleIsOriginalChanged((PropertyChangedEventArgs)e);
-			}
-			return false;
-		}
-		
-		bool IWeakEventListener.ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
-		{
-			return ReceiveWeakEvent(managerType, sender, e);
-		}
-		#endregion
-		
-		#region Text property
-		/// <summary>
-		/// Gets/Sets the text of the current document.
-		/// </summary>
-		[Localizability(LocalizationCategory.Text), DefaultValue("")]
-		public string Text {
-			get {
-				TextDocument document = this.Document;
-				return document != null ? document.Text : string.Empty;
-			}
-			set {
-				TextDocument document = GetDocument();
-				document.Text = value ?? string.Empty;
-				// after replacing the full text, the caret is positioned at the end of the document
-				// - reset it to the beginning.
-				this.CaretOffset = 0;
-				document.UndoStack.ClearAll();
-			}
-		}
-		
-		TextDocument GetDocument()
-		{
-			TextDocument document = this.Document;
-			if (document == null)
-				throw ThrowUtil.NoDocumentAssigned();
-			return document;
-		}
-		
-		/// <summary>
-		/// Occurs when the Text property changes.
-		/// </summary>
-		public event EventHandler TextChanged;
-		
-		/// <summary>
-		/// Raises the <see cref="TextChanged"/> event.
-		/// </summary>
-		protected virtual void OnTextChanged(EventArgs e)
-		{
-			if (TextChanged != null) {
-				TextChanged(this, e);
-			}
-		}
-		#endregion
-		
-		#region TextArea / ScrollViewer properties
-		readonly TextArea textArea;
-		ScrollViewer scrollViewer;
-		
-		/// <summary>
-		/// Is called after the template was applied.
-		/// </summary>
-		public override void OnApplyTemplate()
-		{
-			base.OnApplyTemplate();
-			scrollViewer = (ScrollViewer)Template.FindName("PART_ScrollViewer", this);
-		}
-		
-		/// <summary>
-		/// Gets the text area.
-		/// </summary>
-		public TextArea TextArea {
-			get {
-				return textArea;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the scroll viewer used by the text editor.
-		/// This property can return null if the template has not been applied / does not contain a scroll viewer.
-		/// </summary>
-		internal ScrollViewer ScrollViewer {
-			get { return scrollViewer; }
-		}
-		
-		bool CanExecute(RoutedUICommand command)
-		{
-			TextArea textArea = this.TextArea;
-			if (textArea == null)
-				return false;
-			else
-				return command.CanExecute(null, textArea);
-		}
-		
-		void Execute(RoutedUICommand command)
-		{
-			TextArea textArea = this.TextArea;
-			if (textArea != null)
-				command.Execute(null, textArea);
-		}
-		#endregion
-		
-		#region Syntax highlighting
-		/// <summary>
-		/// The <see cref="SyntaxHighlighting"/> property.
-		/// </summary>
-		public static readonly DependencyProperty SyntaxHighlightingProperty =
-			DependencyProperty.Register("SyntaxHighlighting", typeof(IHighlightingDefinition), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(OnSyntaxHighlightingChanged));
-		
-		
-		/// <summary>
-		/// Gets/sets the syntax highlighting definition used to colorize the text.
-		/// </summary>
-		public IHighlightingDefinition SyntaxHighlighting {
-			get { return (IHighlightingDefinition)GetValue(SyntaxHighlightingProperty); }
-			set { SetValue(SyntaxHighlightingProperty, value); }
-		}
-		
-		IVisualLineTransformer colorizer;
-		
-		static void OnSyntaxHighlightingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-		{
-			((TextEditor)d).OnSyntaxHighlightingChanged(e.NewValue as IHighlightingDefinition);
-		}
-		
-		void OnSyntaxHighlightingChanged(IHighlightingDefinition newValue)
-		{
-			if (colorizer != null) {
-				this.TextArea.TextView.LineTransformers.Remove(colorizer);
-				colorizer = null;
-			}
-			if (newValue != null) {
-				colorizer = CreateColorizer(newValue);
-				this.TextArea.TextView.LineTransformers.Insert(0, colorizer);
-			}
-		}
-		
-		/// <summary>
-		/// Creates the highlighting colorizer for the specified highlighting definition.
-		/// Allows derived classes to provide custom colorizer implementations for special highlighting definitions.
-		/// </summary>
-		/// <returns></returns>
-		protected virtual IVisualLineTransformer CreateColorizer(IHighlightingDefinition highlightingDefinition)
-		{
-			if (highlightingDefinition == null)
-				throw new ArgumentNullException("highlightingDefinition");
-			return new HighlightingColorizer(highlightingDefinition.MainRuleSet);
-		}
-		#endregion
-		
-		#region WordWrap
-		/// <summary>
-		/// Word wrap dependency property.
-		/// </summary>
-		public static readonly DependencyProperty WordWrapProperty =
-			DependencyProperty.Register("WordWrap", typeof(bool), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(Boxes.False));
-		
-		/// <summary>
-		/// Specifies whether the text editor uses word wrapping.
-		/// </summary>
-		/// <remarks>
-		/// Setting WordWrap=true has the same effect as setting HorizontalScrollBarVisibility=Disabled and will override the
-		/// HorizontalScrollBarVisibility setting.
-		/// </remarks>
-		public bool WordWrap {
-			get { return (bool)GetValue(WordWrapProperty); }
-			set { SetValue(WordWrapProperty, Boxes.Box(value)); }
-		}
-		#endregion
-		
-		#region IsReadOnly
-		/// <summary>
-		/// IsReadOnly dependency property.
-		/// </summary>
-		public static readonly DependencyProperty IsReadOnlyProperty =
-			DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(Boxes.False, OnIsReadOnlyChanged));
-		
-		/// <summary>
-		/// Specifies whether the user can change the text editor content.
-		/// Setting this property will replace the
-		/// <see cref="Editing.TextArea.ReadOnlySectionProvider">TextArea.ReadOnlySectionProvider</see>.
-		/// </summary>
-		public bool IsReadOnly {
-			get { return (bool)GetValue(IsReadOnlyProperty); }
-			set { SetValue(IsReadOnlyProperty, Boxes.Box(value)); }
-		}
-		
-		static void OnIsReadOnlyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-		{
-			TextEditor editor = d as TextEditor;
-			if (editor != null) {
-				if ((bool)e.NewValue)
-					editor.TextArea.ReadOnlySectionProvider = ReadOnlyDocument.Instance;
-				else
-					editor.TextArea.ReadOnlySectionProvider = NoReadOnlySections.Instance;
-				
-				TextEditorAutomationPeer peer = TextEditorAutomationPeer.FromElement(editor) as TextEditorAutomationPeer;
-				if (peer != null) {
-					peer.RaiseIsReadOnlyChanged((bool)e.OldValue, (bool)e.NewValue);
-				}
-			}
-		}
-		#endregion
-		
-		#region IsModified
-		/// <summary>
-		/// Dependency property for <see cref="IsModified"/>
-		/// </summary>
-		public static readonly DependencyProperty IsModifiedProperty =
-			DependencyProperty.Register("IsModified", typeof(bool), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(Boxes.False, OnIsModifiedChanged));
-		
-		/// <summary>
-		/// Gets/Sets the 'modified' flag.
-		/// </summary>
-		public bool IsModified {
-			get { return (bool)GetValue(IsModifiedProperty); }
-			set { SetValue(IsModifiedProperty, Boxes.Box(value)); }
-		}
-		
-		static void OnIsModifiedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-		{
-			TextEditor editor = d as TextEditor;
-			if (editor != null) {
-				TextDocument document = editor.Document;
-				if (document != null) {
-					UndoStack undoStack = document.UndoStack;
-					if ((bool)e.NewValue) {
-						if (undoStack.IsOriginalFile)
-							undoStack.DiscardOriginalFileMarker();
-					} else {
-						undoStack.MarkAsOriginalFile();
-					}
-				}
-			}
-		}
-		
-		bool HandleIsOriginalChanged(PropertyChangedEventArgs e)
-		{
-			if (e.PropertyName == "IsOriginalFile") {
-				TextDocument document = this.Document;
-				if (document != null) {
-					SetCurrentValue(IsModifiedProperty, Boxes.Box(!document.UndoStack.IsOriginalFile));
-				}
-				return true;
-			} else {
-				return false;
-			}
-		}
-		#endregion
-		
-		#region ShowLineNumbers
-		/// <summary>
-		/// ShowLineNumbers dependency property.
-		/// </summary>
-		public static readonly DependencyProperty ShowLineNumbersProperty =
-			DependencyProperty.Register("ShowLineNumbers", typeof(bool), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(Boxes.False, OnShowLineNumbersChanged));
-		
-		/// <summary>
-		/// Specifies whether line numbers are shown on the left to the text view.
-		/// </summary>
-		public bool ShowLineNumbers {
-			get { return (bool)GetValue(ShowLineNumbersProperty); }
-			set { SetValue(ShowLineNumbersProperty, Boxes.Box(value)); }
-		}
-		
-		static void OnShowLineNumbersChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-		{
-			TextEditor editor = (TextEditor)d;
-			var leftMargins = editor.TextArea.LeftMargins;
-			if ((bool)e.NewValue) {
-				LineNumberMargin lineNumbers = new LineNumberMargin();
-				Line line = (Line)DottedLineMargin.Create();
-				leftMargins.Insert(0, lineNumbers);
-				leftMargins.Insert(1, line);
-				var lineNumbersForeground = new Binding("LineNumbersForeground") { Source = editor };
-				line.SetBinding(Line.StrokeProperty, lineNumbersForeground);
-				lineNumbers.SetBinding(Control.ForegroundProperty, lineNumbersForeground);
-			} else {
-				for (int i = 0; i < leftMargins.Count; i++) {
-					if (leftMargins[i] is LineNumberMargin) {
-						leftMargins.RemoveAt(i);
-						if (i < leftMargins.Count && DottedLineMargin.IsDottedLineMargin(leftMargins[i])) {
-							leftMargins.RemoveAt(i);
-						}
-						break;
-					}
-				}
-			}
-		}
-		#endregion
-		
-		#region LineNumbersForeground
-		/// <summary>
-		/// LineNumbersForeground dependency property.
-		/// </summary>
-		public static readonly DependencyProperty LineNumbersForegroundProperty =
-			DependencyProperty.Register("LineNumbersForeground", typeof(Brush), typeof(TextEditor),
-			                            new FrameworkPropertyMetadata(Brushes.Gray, OnLineNumbersForegroundChanged));
-		
-		/// <summary>
-		/// Gets/sets the Brush used for displaying the foreground color of line numbers.
-		/// </summary>
-		public Brush LineNumbersForeground {
-			get { return (Brush)GetValue(LineNumbersForegroundProperty); }
-			set { SetValue(LineNumbersForegroundProperty, value); }
-		}
-		
-		static void OnLineNumbersForegroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-		{
-			TextEditor editor = (TextEditor)d;
-			var lineNumberMargin = editor.TextArea.LeftMargins.FirstOrDefault(margin => margin is LineNumberMargin) as LineNumberMargin;;
-			
-			if (lineNumberMargin != null) {
-				lineNumberMargin.SetValue(Control.ForegroundProperty, e.NewValue);
-			}
-		}
-		#endregion
-		
-		#region TextBoxBase-like methods
-		/// <summary>
-		/// Appends text to the end of the document.
-		/// </summary>
-		public void AppendText(string textData)
-		{
-			var document = GetDocument();
-			document.Insert(document.TextLength, textData);
-		}
-		
-		/// <summary>
-		/// Begins a group of document changes.
-		/// </summary>
-		public void BeginChange()
-		{
-			GetDocument().BeginUpdate();
-		}
-		
-		/// <summary>
-		/// Copies the current selection to the clipboard.
-		/// </summary>
-		public void Copy()
-		{
-			Execute(ApplicationCommands.Copy);
-		}
-		
-		/// <summary>
-		/// Removes the current selection and copies it to the clipboard.
-		/// </summary>
-		public void Cut()
-		{
-			Execute(ApplicationCommands.Cut);
-		}
-		
-		/// <summary>
-		/// Begins a group of document changes and returns an object that ends the group of document
-		/// changes when it is disposed.
-		/// </summary>
-		public IDisposable DeclareChangeBlock()
-		{
-			return GetDocument().RunUpdate();
-		}
-		
-		/// <summary>
-		/// Ends the current group of document changes.
-		/// </summary>
-		public void EndChange()
-		{
-			GetDocument().EndUpdate();
-		}
-		
-		/// <summary>
-		/// Scrolls one line down.
-		/// </summary>
-		public void LineDown()
-		{
-			if (scrollViewer != null)
-				scrollViewer.LineDown();
-		}
-		
-		/// <summary>
-		/// Scrolls to the left.
-		/// </summary>
-		public void LineLeft()
-		{
-			if (scrollViewer != null)
-				scrollViewer.LineLeft();
-		}
-		
-		/// <summary>
-		/// Scrolls to the right.
-		/// </summary>
-		public void LineRight()
-		{
-			if (scrollViewer != null)
-				scrollViewer.LineRight();
-		}
-		
-		/// <summary>
-		/// Scrolls one line up.
-		/// </summary>
-		public void LineUp()
-		{
-			if (scrollViewer != null)
-				scrollViewer.LineUp();
-		}
-		
-		/// <summary>
-		/// Scrolls one page down.
-		/// </summary>
-		public void PageDown()
-		{
-			if (scrollViewer != null)
-				scrollViewer.PageDown();
-		}
-		
-		/// <summary>
-		/// Scrolls one page up.
-		/// </summary>
-		public void PageUp()
-		{
-			if (scrollViewer != null)
-				scrollViewer.PageUp();
-		}
-		
-		/// <summary>
-		/// Scrolls one page left.
-		/// </summary>
-		public void PageLeft()
-		{
-			if (scrollViewer != null)
-				scrollViewer.PageLeft();
-		}
-		
-		/// <summary>
-		/// Scrolls one page right.
-		/// </summary>
-		public void PageRight()
-		{
-			if (scrollViewer != null)
-				scrollViewer.PageRight();
-		}
-		
-		/// <summary>
-		/// Pastes the clipboard content.
-		/// </summary>
-		public void Paste()
-		{
-			Execute(ApplicationCommands.Paste);
-		}
-		
-		/// <summary>
-		/// Redoes the most recent undone command.
-		/// </summary>
-		/// <returns>True is the redo operation was successful, false is the redo stack is empty.</returns>
-		public bool Redo()
-		{
-			if (CanExecute(ApplicationCommands.Redo)) {
-				Execute(ApplicationCommands.Redo);
-				return true;
-			}
-			return false;
-		}
-		
-		/// <summary>
-		/// Scrolls to the end of the document.
-		/// </summary>
-		public void ScrollToEnd()
-		{
-			ApplyTemplate(); // ensure scrollViewer is created
-			if (scrollViewer != null)
-				scrollViewer.ScrollToEnd();
-		}
-		
-		/// <summary>
-		/// Scrolls to the start of the document.
-		/// </summary>
-		public void ScrollToHome()
-		{
-			ApplyTemplate(); // ensure scrollViewer is created
-			if (scrollViewer != null)
-				scrollViewer.ScrollToHome();
-		}
-		
-		/// <summary>
-		/// Scrolls to the specified position in the document.
-		/// </summary>
-		public void ScrollToHorizontalOffset(double offset)
-		{
-			ApplyTemplate(); // ensure scrollViewer is created
-			if (scrollViewer != null)
-				scrollViewer.ScrollToHorizontalOffset(offset);
-		}
-		
-		/// <summary>
-		/// Scrolls to the specified position in the document.
-		/// </summary>
-		public void ScrollToVerticalOffset(double offset)
-		{
-			ApplyTemplate(); // ensure scrollViewer is created
-			if (scrollViewer != null)
-				scrollViewer.ScrollToVerticalOffset(offset);
-		}
-		
-		/// <summary>
-		/// Selects the entire text.
-		/// </summary>
-		public void SelectAll()
-		{
-			Execute(ApplicationCommands.SelectAll);
-		}
-		
-		/// <summary>
-		/// Undoes the most recent command.
-		/// </summary>
-		/// <returns>True is the undo operation was successful, false is the undo stack is empty.</returns>
-		public bool Undo()
-		{
-			if (CanExecute(ApplicationCommands.Undo)) {
-				Execute(ApplicationCommands.Undo);
-				return true;
-			}
-			return false;
-		}
-		
-		/// <summary>
-		/// Gets if the most recent undone command can be redone.
-		/// </summary>
-		public bool CanRedo {
-			get { return CanExecute(ApplicationCommands.Redo); }
-		}
-		
-		/// <summary>
-		/// Gets if the most recent command can be undone.
-		/// </summary>
-		public bool CanUndo {
-			get { return CanExecute(ApplicationCommands.Undo); }
-		}
-		
-		/// <summary>
-		/// Gets the vertical size of the document.
-		/// </summary>
-		public double ExtentHeight {
-			get {
-				return scrollViewer != null ? scrollViewer.ExtentHeight : 0;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the horizontal size of the current document region.
-		/// </summary>
-		public double ExtentWidth {
-			get {
-				return scrollViewer != null ? scrollViewer.ExtentWidth : 0;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the horizontal size of the viewport.
-		/// </summary>
-		public double ViewportHeight {
-			get {
-				return scrollViewer != null ? scrollViewer.ViewportHeight : 0;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the horizontal size of the viewport.
-		/// </summary>
-		public double ViewportWidth {
-			get {
-				return scrollViewer != null ? scrollViewer.ViewportWidth : 0;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the vertical scroll position.
-		/// </summary>
-		public double VerticalOffset {
-			get {
-				return scrollViewer != null ? scrollViewer.VerticalOffset : 0;
-			}
-		}
-		
-		/// <summary>
-		/// Gets the horizontal scroll position.
-		/// </summary>
-		public double HorizontalOffset {
-			get {
-				return scrollViewer != null ? scrollViewer.HorizontalOffset : 0;
-			}
-		}
-		#endregion
-		
-		#region TextBox methods
-		/// <summary>
-		/// Gets/Sets the selected text.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public string SelectedText {
-			get {
-				TextArea textArea = this.TextArea;
-				// We'll get the text from the whole surrounding segment.
-				// This is done to ensure that SelectedText.Length == SelectionLength.
-				if (textArea != null && textArea.Document != null && !textArea.Selection.IsEmpty)
-					return textArea.Document.GetText(textArea.Selection.SurroundingSegment);
-				else
-					return string.Empty;
-			}
-			set {
-				if (value == null)
-					throw new ArgumentNullException("value");
-				TextArea textArea = this.TextArea;
-				if (textArea != null && textArea.Document != null) {
-					int offset = this.SelectionStart;
-					int length = this.SelectionLength;
-					textArea.Document.Replace(offset, length, value);
-					// keep inserted text selected
-					textArea.Selection = SimpleSelection.Create(textArea, offset, offset + value.Length);
-				}
-			}
-		}
-		
-		/// <summary>
-		/// Gets/sets the caret position.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public int CaretOffset {
-			get {
-				TextArea textArea = this.TextArea;
-				if (textArea != null)
-					return textArea.Caret.Offset;
-				else
-					return 0;
-			}
-			set {
-				TextArea textArea = this.TextArea;
-				if (textArea != null)
-					textArea.Caret.Offset = value;
-			}
-		}
-		
-		/// <summary>
-		/// Gets/sets the start position of the selection.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public int SelectionStart {
-			get {
-				TextArea textArea = this.TextArea;
-				if (textArea != null) {
-					if (textArea.Selection.IsEmpty)
-						return textArea.Caret.Offset;
-					else
-						return textArea.Selection.SurroundingSegment.Offset;
-				} else {
-					return 0;
-				}
-			}
-			set {
-				Select(value, SelectionLength);
-			}
-		}
-		
-		/// <summary>
-		/// Gets/sets the length of the selection.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public int SelectionLength {
-			get {
-				TextArea textArea = this.TextArea;
-				if (textArea != null && !textArea.Selection.IsEmpty)
-					return textArea.Selection.SurroundingSegment.Length;
-				else
-					return 0;
-			}
-			set {
-				Select(SelectionStart, value);
-			}
-		}
-		
-		/// <summary>
-		/// Selects the specified text section.
-		/// </summary>
-		public void Select(int start, int length)
-		{
-			int documentLength = Document != null ? Document.TextLength : 0;
-			if (start < 0 || start > documentLength)
-				throw new ArgumentOutOfRangeException("start", start, "Value must be between 0 and " + documentLength);
-			if (length < 0 || start + length > documentLength)
-				throw new ArgumentOutOfRangeException("length", length, "Value must be between 0 and " + (documentLength - length));
-			textArea.Selection = SimpleSelection.Create(textArea, start, start + length);
-			textArea.Caret.Offset = start + length;
-		}
-		
-		/// <summary>
-		/// Gets the number of lines in the document.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public int LineCount {
-			get {
-				TextDocument document = this.Document;
-				if (document != null)
-					return document.LineCount;
-				else
-					return 1;
-			}
-		}
-		
-		/// <summary>
-		/// Clears the text.
-		/// </summary>
-		public void Clear()
-		{
-			this.Text = string.Empty;
-		}
-		#endregion
-		
-		#region Loading from stream
-		/// <summary>
-		/// Loads the text from the stream, auto-detecting the encoding.
-		/// </summary>
-		/// <remarks>
-		/// This method sets <see cref="IsModified"/> to false.
-		/// </remarks>
-		public void Load(Stream stream)
-		{
-			using (StreamReader reader = FileReader.OpenStream(stream, this.Encoding ?? Encoding.UTF8)) {
-				this.Text = reader.ReadToEnd();
-				this.Encoding = reader.CurrentEncoding; // assign encoding after ReadToEnd() so that the StreamReader can autodetect the encoding
-			}
-			this.IsModified = false;
-		}
-		
-		/// <summary>
-		/// Loads the text from the stream, auto-detecting the encoding.
-		/// </summary>
-		public void Load(string fileName)
-		{
-			if (fileName == null)
-				throw new ArgumentNullException("fileName");
-			using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
-				Load(fs);
-			}
-		}
-		
-		/// <summary>
-		/// Gets/sets the encoding used when the file is saved.
-		/// </summary>
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		public Encoding Encoding { get; set; }
-		
-		/// <summary>
-		/// Saves the text to the stream.
-		/// </summary>
-		/// <remarks>
-		/// This method sets <see cref="IsModified"/> to false.
-		/// </remarks>
-		public void Save(Stream stream)
-		{
-			if (stream == null)
-				throw new ArgumentNullException("stream");
-			StreamWriter writer = new StreamWriter(stream, this.Encoding ?? Encoding.UTF8);
-			writer.Write(this.Text);
-			writer.Flush();
-			// do not close the stream
-			this.IsModified = false;
-		}
-		
-		/// <summary>
-		/// Saves the text to the file.
-		/// </summary>
-		public void Save(string fileName)
-		{
-			if (fileName == null)
-				throw new ArgumentNullException("fileName");
-			using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None)) {
-				Save(fs);
-			}
-		}
-		#endregion
-		
-		#region MouseHover events
-		/// <summary>
-		/// The PreviewMouseHover event.
-		/// </summary>
-		public static readonly RoutedEvent PreviewMouseHoverEvent =
-			TextView.PreviewMouseHoverEvent.AddOwner(typeof(TextEditor));
-		
-		/// <summary>
-		/// The MouseHover event.
-		/// </summary>
-		public static readonly RoutedEvent MouseHoverEvent =
-			TextView.MouseHoverEvent.AddOwner(typeof(TextEditor));
-		
-		
-		/// <summary>
-		/// The PreviewMouseHoverStopped event.
-		/// </summary>
-		public static readonly RoutedEvent PreviewMouseHoverStoppedEvent =
-			TextView.PreviewMouseHoverStoppedEvent.AddOwner(typeof(TextEditor));
-		
-		/// <summary>
-		/// The MouseHoverStopped event.
-		/// </summary>
-		public static readonly RoutedEvent MouseHoverStoppedEvent =
-			TextView.MouseHoverStoppedEvent.AddOwner(typeof(TextEditor));
-		
-		
-		/// <summary>
-		/// Occurs when the mouse has hovered over a fixed location for some time.
-		/// </summary>
-		public event MouseEventHandler PreviewMouseHover {
-			add { AddHandler(PreviewMouseHoverEvent, value); }
-			remove { RemoveHandler(PreviewMouseHoverEvent, value); }
-		}
-		
-		/// <summary>
-		/// Occurs when the mouse has hovered over a fixed location for some time.
-		/// </summary>
-		public event MouseEventHandler MouseHover {
-			add { AddHandler(MouseHoverEvent, value); }
-			remove { RemoveHandler(MouseHoverEvent, value); }
-		}
-		
-		/// <summary>
-		/// Occurs when the mouse had previously hovered but now started moving again.
-		/// </summary>
-		public event MouseEventHandler PreviewMouseHoverStopped {
-			add { AddHandler(PreviewMouseHoverStoppedEvent, value); }
-			remove { RemoveHandler(PreviewMouseHoverStoppedEvent, value); }
-		}
-		
-		/// <summary>
-		/// Occurs when the mouse had previously hovered but now started moving again.
-		/// </summary>
-		public event MouseEventHandler MouseHoverStopped {
-			add { AddHandler(MouseHoverStoppedEvent, value); }
-			remove { RemoveHandler(MouseHoverStoppedEvent, value); }
-		}
-		#endregion
-		
-		#region ScrollBarVisibility
-		/// <summary>
-		/// Dependency property for <see cref="HorizontalScrollBarVisibility"/>
-		/// </summary>
-		public static readonly DependencyProperty HorizontalScrollBarVisibilityProperty = ScrollViewer.HorizontalScrollBarVisibilityProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(ScrollBarVisibility.Visible));
-		
-		/// <summary>
-		/// Gets/Sets the horizontal scroll bar visibility.
-		/// </summary>
-		public ScrollBarVisibility HorizontalScrollBarVisibility {
-			get { return (ScrollBarVisibility)GetValue(HorizontalScrollBarVisibilityProperty); }
-			set { SetValue(HorizontalScrollBarVisibilityProperty, value); }
-		}
-		
-		/// <summary>
-		/// Dependency property for <see cref="VerticalScrollBarVisibility"/>
-		/// </summary>
-		public static readonly DependencyProperty VerticalScrollBarVisibilityProperty = ScrollViewer.VerticalScrollBarVisibilityProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(ScrollBarVisibility.Visible));
-		
-		/// <summary>
-		/// Gets/Sets the vertical scroll bar visibility.
-		/// </summary>
-		public ScrollBarVisibility VerticalScrollBarVisibility {
-			get { return (ScrollBarVisibility)GetValue(VerticalScrollBarVisibilityProperty); }
-			set { SetValue(VerticalScrollBarVisibilityProperty, value); }
-		}
-		#endregion
-		
-		object IServiceProvider.GetService(Type serviceType)
-		{
-			return textArea.GetService(serviceType);
-		}
-		
-		/// <summary>
-		/// Gets the text view position from a point inside the editor.
-		/// </summary>
-		/// <param name="point">The position, relative to top left
-		/// corner of TextEditor control</param>
-		/// <returns>The text view position, or null if the point is outside the document.</returns>
-		public TextViewPosition? GetPositionFromPoint(Point point)
-		{
-			if (this.Document == null)
-				return null;
-			TextView textView = this.TextArea.TextView;
-			return textView.GetPosition(TranslatePoint(point, textView) + textView.ScrollOffset);
-		}
-		
-		/// <summary>
-		/// Scrolls to the specified line.
-		/// This method requires that the TextEditor was already assigned a size (WPF layout must have run prior).
-		/// </summary>
-		public void ScrollToLine(int line)
-		{
-			ScrollTo(line, -1);
-		}
-		
-		/// <summary>
-		/// Scrolls to the specified line/column.
-		/// This method requires that the TextEditor was already assigned a size (WPF layout must have run prior).
-		/// </summary>
-		public void ScrollTo(int line, int column)
-		{
-			const double MinimumScrollPercentage = 0.3;
-			
-			TextView textView = textArea.TextView;
-			TextDocument document = textView.Document;
-			if (scrollViewer != null && document != null) {
-				if (line < 1)
-					line = 1;
-				if (line > document.LineCount)
-					line = document.LineCount;
-				
-				IScrollInfo scrollInfo = textView;
-				if (!scrollInfo.CanHorizontallyScroll) {
-					// Word wrap is enabled. Ensure that we have up-to-date info about line height so that we scroll
-					// to the correct position.
-					// This avoids that the user has to repeat the ScrollTo() call several times when there are very long lines.
-					VisualLine vl = textView.GetOrConstructVisualLine(document.GetLineByNumber(line));
-					double remainingHeight = scrollViewer.ViewportHeight / 2;
-					while (remainingHeight > 0) {
-						DocumentLine prevLine = vl.FirstDocumentLine.PreviousLine;
-						if (prevLine == null)
-							break;
-						vl = textView.GetOrConstructVisualLine(prevLine);
-						remainingHeight -= vl.Height;
-					}
-				}
-				
-				Point p = textArea.TextView.GetVisualPosition(new TextViewPosition(line, Math.Max(1, column)), VisualYPosition.LineMiddle);
-				double verticalPos = p.Y - scrollViewer.ViewportHeight / 2;
-				if (Math.Abs(verticalPos - scrollViewer.VerticalOffset) > MinimumScrollPercentage * scrollViewer.ViewportHeight) {
-					scrollViewer.ScrollToVerticalOffset(Math.Max(0, verticalPos));
-				}
-				if (column > 0) {
-					if (p.X > scrollViewer.ViewportWidth - Caret.MinimumDistanceToViewBorder * 2) {
-						double horizontalPos = Math.Max(0, p.X - scrollViewer.ViewportWidth / 2);
-						if (Math.Abs(horizontalPos - scrollViewer.HorizontalOffset) > MinimumScrollPercentage * scrollViewer.ViewportWidth) {
-							scrollViewer.ScrollToHorizontalOffset(horizontalPos);
-						}
-					} else {
-						scrollViewer.ScrollToHorizontalOffset(0);
-					}
-				}
-			}
-		}
-	}
+    /// <summary>
+    /// The text editor control.
+    /// Contains a scrollable TextArea.
+    /// </summary>
+    [Localizability(LocalizationCategory.Text), ContentProperty("Text")]
+    public class TextEditor : Control, ITextEditorComponent, IServiceProvider, IWeakEventListener
+    {
+        #region Constructors
+        static TextEditor()
+        {
+            DefaultStyleKeyProperty.OverrideMetadata(typeof(TextEditor),
+                                                     new FrameworkPropertyMetadata(typeof(TextEditor)));
+            FocusableProperty.OverrideMetadata(typeof(TextEditor),
+                                               new FrameworkPropertyMetadata(Boxes.True));
+        }
+
+        /// <summary>
+        /// Creates a new TextEditor instance.
+        /// </summary>
+        public TextEditor() : this(new TextArea())
+        {
+        }
+
+        /// <summary>
+        /// Creates a new TextEditor instance.
+        /// </summary>
+        protected TextEditor(TextArea textArea)
+        {
+            if (textArea == null)
+                throw new ArgumentNullException("textArea");
+            this.textArea = textArea;
+
+            textArea.TextView.Services.AddService(typeof(TextEditor), this);
+
+            SetCurrentValue(OptionsProperty, textArea.Options);
+            SetCurrentValue(DocumentProperty, new TextDocument());
+        }
+
+        #endregion
+
+        /// <inheritdoc/>
+        protected override System.Windows.Automation.Peers.AutomationPeer OnCreateAutomationPeer()
+        {
+            return new TextEditorAutomationPeer(this);
+        }
+
+        /// Forward focus to TextArea.
+        /// <inheritdoc/>
+        protected override void OnGotKeyboardFocus(KeyboardFocusChangedEventArgs e)
+        {
+            base.OnGotKeyboardFocus(e);
+            if (e.NewFocus == this)
+            {
+                Keyboard.Focus(this.TextArea);
+                e.Handled = true;
+            }
+        }
+
+        #region Document property
+        /// <summary>
+        /// Document property.
+        /// </summary>
+        public static readonly DependencyProperty DocumentProperty
+            = TextView.DocumentProperty.AddOwner(
+                typeof(TextEditor), new FrameworkPropertyMetadata(OnDocumentChanged));
+
+        /// <summary>
+        /// Gets/Sets the document displayed by the text editor.
+        /// This is a dependency property.
+        /// </summary>
+        public TextDocument Document
+        {
+            get { return (TextDocument)GetValue(DocumentProperty); }
+            set { SetValue(DocumentProperty, value); }
+        }
+
+        /// <summary>
+        /// Occurs when the document property has changed.
+        /// </summary>
+        public event EventHandler DocumentChanged;
+
+        /// <summary>
+        /// Raises the <see cref="DocumentChanged"/> event.
+        /// </summary>
+        protected virtual void OnDocumentChanged(EventArgs e)
+        {
+            if (DocumentChanged != null)
+            {
+                DocumentChanged(this, e);
+            }
+        }
+
+        static void OnDocumentChanged(DependencyObject dp, DependencyPropertyChangedEventArgs e)
+        {
+            ((TextEditor)dp).OnDocumentChanged((TextDocument)e.OldValue, (TextDocument)e.NewValue);
+        }
+
+        void OnDocumentChanged(TextDocument oldValue, TextDocument newValue)
+        {
+            if (oldValue != null)
+            {
+                TextDocumentWeakEventManager.TextChanged.RemoveListener(oldValue, this);
+                PropertyChangedEventManager.RemoveListener(oldValue.UndoStack, this, "IsOriginalFile");
+            }
+            textArea.Document = newValue;
+            if (newValue != null)
+            {
+                TextDocumentWeakEventManager.TextChanged.AddListener(newValue, this);
+                PropertyChangedEventManager.AddListener(newValue.UndoStack, this, "IsOriginalFile");
+            }
+            OnDocumentChanged(EventArgs.Empty);
+            OnTextChanged(EventArgs.Empty);
+        }
+        #endregion
+
+        #region Options property
+        /// <summary>
+        /// Options property.
+        /// </summary>
+        public static readonly DependencyProperty OptionsProperty
+            = TextView.OptionsProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(OnOptionsChanged));
+
+        /// <summary>
+        /// Gets/Sets the options currently used by the text editor.
+        /// </summary>
+        public TextEditorOptions Options
+        {
+            get { return (TextEditorOptions)GetValue(OptionsProperty); }
+            set { SetValue(OptionsProperty, value); }
+        }
+
+        /// <summary>
+        /// Occurs when a text editor option has changed.
+        /// </summary>
+        public event PropertyChangedEventHandler OptionChanged;
+
+        /// <summary>
+        /// Raises the <see cref="OptionChanged"/> event.
+        /// </summary>
+        protected virtual void OnOptionChanged(PropertyChangedEventArgs e)
+        {
+            if (OptionChanged != null)
+            {
+                OptionChanged(this, e);
+            }
+        }
+
+        static void OnOptionsChanged(DependencyObject dp, DependencyPropertyChangedEventArgs e)
+        {
+            ((TextEditor)dp).OnOptionsChanged((TextEditorOptions)e.OldValue, (TextEditorOptions)e.NewValue);
+        }
+
+        void OnOptionsChanged(TextEditorOptions oldValue, TextEditorOptions newValue)
+        {
+            if (oldValue != null)
+            {
+                PropertyChangedWeakEventManager.RemoveListener(oldValue, this);
+            }
+            textArea.Options = newValue;
+            if (newValue != null)
+            {
+                PropertyChangedWeakEventManager.AddListener(newValue, this);
+            }
+            OnOptionChanged(new PropertyChangedEventArgs(null));
+        }
+
+        /// <inheritdoc cref="IWeakEventListener.ReceiveWeakEvent"/>
+        protected virtual bool ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
+        {
+            if (managerType == typeof(PropertyChangedWeakEventManager))
+            {
+                OnOptionChanged((PropertyChangedEventArgs)e);
+                return true;
+            }
+            else if (managerType == typeof(TextDocumentWeakEventManager.TextChanged))
+            {
+                OnTextChanged(e);
+                return true;
+            }
+            else if (managerType == typeof(PropertyChangedEventManager))
+            {
+                return HandleIsOriginalChanged((PropertyChangedEventArgs)e);
+            }
+            return false;
+        }
+
+        bool IWeakEventListener.ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
+        {
+            return ReceiveWeakEvent(managerType, sender, e);
+        }
+        #endregion
+
+        #region Text property
+        /// <summary>
+        /// Gets/Sets the text of the current document.
+        /// </summary>
+        [Localizability(LocalizationCategory.Text), DefaultValue("")]
+        public string Text
+        {
+            get
+            {
+                TextDocument document = this.Document;
+                return document != null ? document.Text : string.Empty;
+            }
+            set
+            {
+                TextDocument document = GetDocument();
+                document.Text = value ?? string.Empty;
+                // after replacing the full text, the caret is positioned at the end of the document
+                // - reset it to the beginning.
+                this.CaretOffset = 0;
+                document.UndoStack.ClearAll();
+            }
+        }
+
+        TextDocument GetDocument()
+        {
+            TextDocument document = this.Document;
+            if (document == null)
+                throw ThrowUtil.NoDocumentAssigned();
+            return document;
+        }
+
+        /// <summary>
+        /// Occurs when the Text property changes.
+        /// </summary>
+        public event EventHandler TextChanged;
+
+        /// <summary>
+        /// Raises the <see cref="TextChanged"/> event.
+        /// </summary>
+        protected virtual void OnTextChanged(EventArgs e)
+        {
+            if (TextChanged != null)
+            {
+                TextChanged(this, e);
+            }
+        }
+        #endregion
+
+        #region TextArea / ScrollViewer properties
+        readonly TextArea textArea;
+        ScrollViewer scrollViewer;
+
+        /// <summary>
+        /// Is called after the template was applied.
+        /// </summary>
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+            scrollViewer = (ScrollViewer)Template.FindName("PART_ScrollViewer", this);
+        }
+
+        /// <summary>
+        /// Gets the text area.
+        /// </summary>
+        public TextArea TextArea
+        {
+            get
+            {
+                return textArea;
+            }
+        }
+
+        /// <summary>
+        /// Gets the scroll viewer used by the text editor.
+        /// This property can return null if the template has not been applied / does not contain a scroll viewer.
+        /// </summary>
+        internal ScrollViewer ScrollViewer
+        {
+            get { return scrollViewer; }
+        }
+
+        bool CanExecute(RoutedUICommand command)
+        {
+            TextArea textArea = this.TextArea;
+            if (textArea == null)
+                return false;
+            else
+                return command.CanExecute(null, textArea);
+        }
+
+        void Execute(RoutedUICommand command)
+        {
+            TextArea textArea = this.TextArea;
+            if (textArea != null)
+                command.Execute(null, textArea);
+        }
+        #endregion
+
+        #region Syntax highlighting
+        /// <summary>
+        /// The <see cref="SyntaxHighlighting"/> property.
+        /// </summary>
+        public static readonly DependencyProperty SyntaxHighlightingProperty =
+            DependencyProperty.Register("SyntaxHighlighting", typeof(IHighlightingDefinition), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(OnSyntaxHighlightingChanged));
+
+
+        /// <summary>
+        /// Gets/sets the syntax highlighting definition used to colorize the text.
+        /// </summary>
+        public IHighlightingDefinition SyntaxHighlighting
+        {
+            get { return (IHighlightingDefinition)GetValue(SyntaxHighlightingProperty); }
+            set { SetValue(SyntaxHighlightingProperty, value); }
+        }
+
+        IVisualLineTransformer colorizer;
+
+        static void OnSyntaxHighlightingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            ((TextEditor)d).OnSyntaxHighlightingChanged(e.NewValue as IHighlightingDefinition);
+        }
+
+        void OnSyntaxHighlightingChanged(IHighlightingDefinition newValue)
+        {
+            if (colorizer != null)
+            {
+                this.TextArea.TextView.LineTransformers.Remove(colorizer);
+                colorizer = null;
+            }
+            if (newValue != null)
+            {
+                colorizer = CreateColorizer(newValue);
+                this.TextArea.TextView.LineTransformers.Insert(0, colorizer);
+            }
+        }
+
+        /// <summary>
+        /// Creates the highlighting colorizer for the specified highlighting definition.
+        /// Allows derived classes to provide custom colorizer implementations for special highlighting definitions.
+        /// </summary>
+        /// <returns></returns>
+        protected virtual IVisualLineTransformer CreateColorizer(IHighlightingDefinition highlightingDefinition)
+        {
+            if (highlightingDefinition == null)
+                throw new ArgumentNullException("highlightingDefinition");
+            return new HighlightingColorizer(highlightingDefinition.MainRuleSet);
+        }
+        #endregion
+
+        #region WordWrap
+        /// <summary>
+        /// Word wrap dependency property.
+        /// </summary>
+        public static readonly DependencyProperty WordWrapProperty =
+            DependencyProperty.Register("WordWrap", typeof(bool), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(Boxes.False));
+
+        /// <summary>
+        /// Specifies whether the text editor uses word wrapping.
+        /// </summary>
+        /// <remarks>
+        /// Setting WordWrap=true has the same effect as setting HorizontalScrollBarVisibility=Disabled and will override the
+        /// HorizontalScrollBarVisibility setting.
+        /// </remarks>
+        public bool WordWrap
+        {
+            get { return (bool)GetValue(WordWrapProperty); }
+            set { SetValue(WordWrapProperty, Boxes.Box(value)); }
+        }
+        #endregion
+
+        #region IsReadOnly
+        /// <summary>
+        /// IsReadOnly dependency property.
+        /// </summary>
+        public static readonly DependencyProperty IsReadOnlyProperty =
+            DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(Boxes.False, OnIsReadOnlyChanged));
+
+        /// <summary>
+        /// Specifies whether the user can change the text editor content.
+        /// Setting this property will replace the
+        /// <see cref="Editing.TextArea.ReadOnlySectionProvider">TextArea.ReadOnlySectionProvider</see>.
+        /// </summary>
+        public bool IsReadOnly
+        {
+            get { return (bool)GetValue(IsReadOnlyProperty); }
+            set { SetValue(IsReadOnlyProperty, Boxes.Box(value)); }
+        }
+
+        static void OnIsReadOnlyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            TextEditor editor = d as TextEditor;
+            if (editor != null)
+            {
+                if ((bool)e.NewValue)
+                    editor.TextArea.ReadOnlySectionProvider = ReadOnlyDocument.Instance;
+                else
+                    editor.TextArea.ReadOnlySectionProvider = NoReadOnlySections.Instance;
+
+                TextEditorAutomationPeer peer = TextEditorAutomationPeer.FromElement(editor) as TextEditorAutomationPeer;
+                if (peer != null)
+                {
+                    peer.RaiseIsReadOnlyChanged((bool)e.OldValue, (bool)e.NewValue);
+                }
+            }
+        }
+        #endregion
+
+        #region IsModified
+        /// <summary>
+        /// Dependency property for <see cref="IsModified"/>
+        /// </summary>
+        public static readonly DependencyProperty IsModifiedProperty =
+            DependencyProperty.Register("IsModified", typeof(bool), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(Boxes.False, OnIsModifiedChanged));
+
+        /// <summary>
+        /// Gets/Sets the 'modified' flag.
+        /// </summary>
+        public bool IsModified
+        {
+            get { return (bool)GetValue(IsModifiedProperty); }
+            set { SetValue(IsModifiedProperty, Boxes.Box(value)); }
+        }
+
+        static void OnIsModifiedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            TextEditor editor = d as TextEditor;
+            if (editor != null)
+            {
+                TextDocument document = editor.Document;
+                if (document != null)
+                {
+                    UndoStack undoStack = document.UndoStack;
+                    if ((bool)e.NewValue)
+                    {
+                        if (undoStack.IsOriginalFile)
+                            undoStack.DiscardOriginalFileMarker();
+                    }
+                    else
+                    {
+                        undoStack.MarkAsOriginalFile();
+                    }
+                }
+            }
+        }
+
+        bool HandleIsOriginalChanged(PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == "IsOriginalFile")
+            {
+                TextDocument document = this.Document;
+                if (document != null)
+                {
+                    SetCurrentValue(IsModifiedProperty, Boxes.Box(!document.UndoStack.IsOriginalFile));
+                }
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+        #endregion
+
+        #region ShowLineNumbers
+        /// <summary>
+        /// ShowLineNumbers dependency property.
+        /// </summary>
+        public static readonly DependencyProperty ShowLineNumbersProperty =
+            DependencyProperty.Register("ShowLineNumbers", typeof(bool), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(Boxes.False, OnShowLineNumbersChanged));
+
+        /// <summary>
+        /// Specifies whether line numbers are shown on the left to the text view.
+        /// </summary>
+        public bool ShowLineNumbers
+        {
+            get { return (bool)GetValue(ShowLineNumbersProperty); }
+            set { SetValue(ShowLineNumbersProperty, Boxes.Box(value)); }
+        }
+
+        static void OnShowLineNumbersChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            TextEditor editor = (TextEditor)d;
+            var leftMargins = editor.TextArea.LeftMargins;
+            if ((bool)e.NewValue)
+            {
+                LineNumberMargin lineNumbers = new LineNumberMargin();
+                Line line = (Line)DottedLineMargin.Create();
+                leftMargins.Insert(0, lineNumbers);
+                leftMargins.Insert(1, line);
+                var lineNumbersForeground = new Binding("LineNumbersForeground") { Source = editor };
+                line.SetBinding(Line.StrokeProperty, lineNumbersForeground);
+                lineNumbers.SetBinding(Control.ForegroundProperty, lineNumbersForeground);
+            }
+            else
+            {
+                for (int i = 0; i < leftMargins.Count; i++)
+                {
+                    if (leftMargins[i] is LineNumberMargin)
+                    {
+                        leftMargins.RemoveAt(i);
+                        if (i < leftMargins.Count && DottedLineMargin.IsDottedLineMargin(leftMargins[i]))
+                        {
+                            leftMargins.RemoveAt(i);
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+        #endregion
+
+        #region LineNumbersForeground
+        /// <summary>
+        /// LineNumbersForeground dependency property.
+        /// </summary>
+        public static readonly DependencyProperty LineNumbersForegroundProperty =
+            DependencyProperty.Register("LineNumbersForeground", typeof(Brush), typeof(TextEditor),
+                                        new FrameworkPropertyMetadata(Brushes.Gray, OnLineNumbersForegroundChanged));
+
+        /// <summary>
+        /// Gets/sets the Brush used for displaying the foreground color of line numbers.
+        /// </summary>
+        public Brush LineNumbersForeground
+        {
+            get { return (Brush)GetValue(LineNumbersForegroundProperty); }
+            set { SetValue(LineNumbersForegroundProperty, value); }
+        }
+
+        static void OnLineNumbersForegroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            TextEditor editor = (TextEditor)d;
+            var lineNumberMargin = editor.TextArea.LeftMargins.FirstOrDefault(margin => margin is LineNumberMargin) as LineNumberMargin; ;
+
+            if (lineNumberMargin != null)
+            {
+                lineNumberMargin.SetValue(Control.ForegroundProperty, e.NewValue);
+            }
+        }
+        #endregion
+
+        #region TextBoxBase-like methods
+        /// <summary>
+        /// Appends text to the end of the document.
+        /// </summary>
+        public void AppendText(string textData)
+        {
+            var document = GetDocument();
+            document.Insert(document.TextLength, textData);
+        }
+
+        /// <summary>
+        /// Begins a group of document changes.
+        /// </summary>
+        public void BeginChange()
+        {
+            GetDocument().BeginUpdate();
+        }
+
+        /// <summary>
+        /// Copies the current selection to the clipboard.
+        /// </summary>
+        public void Copy()
+        {
+            Execute(ApplicationCommands.Copy);
+        }
+
+        /// <summary>
+        /// Removes the current selection and copies it to the clipboard.
+        /// </summary>
+        public void Cut()
+        {
+            Execute(ApplicationCommands.Cut);
+        }
+
+        /// <summary>
+        /// Begins a group of document changes and returns an object that ends the group of document
+        /// changes when it is disposed.
+        /// </summary>
+        public IDisposable DeclareChangeBlock()
+        {
+            return GetDocument().RunUpdate();
+        }
+
+        /// <summary>
+        /// Ends the current group of document changes.
+        /// </summary>
+        public void EndChange()
+        {
+            GetDocument().EndUpdate();
+        }
+
+        /// <summary>
+        /// Scrolls one line down.
+        /// </summary>
+        public void LineDown()
+        {
+            if (scrollViewer != null)
+                scrollViewer.LineDown();
+        }
+
+        /// <summary>
+        /// Scrolls to the left.
+        /// </summary>
+        public void LineLeft()
+        {
+            if (scrollViewer != null)
+                scrollViewer.LineLeft();
+        }
+
+        /// <summary>
+        /// Scrolls to the right.
+        /// </summary>
+        public void LineRight()
+        {
+            if (scrollViewer != null)
+                scrollViewer.LineRight();
+        }
+
+        /// <summary>
+        /// Scrolls one line up.
+        /// </summary>
+        public void LineUp()
+        {
+            if (scrollViewer != null)
+                scrollViewer.LineUp();
+        }
+
+        /// <summary>
+        /// Scrolls one page down.
+        /// </summary>
+        public void PageDown()
+        {
+            if (scrollViewer != null)
+                scrollViewer.PageDown();
+        }
+
+        /// <summary>
+        /// Scrolls one page up.
+        /// </summary>
+        public void PageUp()
+        {
+            if (scrollViewer != null)
+                scrollViewer.PageUp();
+        }
+
+        /// <summary>
+        /// Scrolls one page left.
+        /// </summary>
+        public void PageLeft()
+        {
+            if (scrollViewer != null)
+                scrollViewer.PageLeft();
+        }
+
+        /// <summary>
+        /// Scrolls one page right.
+        /// </summary>
+        public void PageRight()
+        {
+            if (scrollViewer != null)
+                scrollViewer.PageRight();
+        }
+
+        /// <summary>
+        /// Pastes the clipboard content.
+        /// </summary>
+        public void Paste()
+        {
+            Execute(ApplicationCommands.Paste);
+        }
+
+        /// <summary>
+        /// Redoes the most recent undone command.
+        /// </summary>
+        /// <returns>True is the redo operation was successful, false is the redo stack is empty.</returns>
+        public bool Redo()
+        {
+            if (CanExecute(ApplicationCommands.Redo))
+            {
+                Execute(ApplicationCommands.Redo);
+                return true;
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Scrolls to the end of the document.
+        /// </summary>
+        public void ScrollToEnd()
+        {
+            ApplyTemplate(); // ensure scrollViewer is created
+            if (scrollViewer != null)
+                scrollViewer.ScrollToEnd();
+        }
+
+        /// <summary>
+        /// Scrolls to the start of the document.
+        /// </summary>
+        public void ScrollToHome()
+        {
+            ApplyTemplate(); // ensure scrollViewer is created
+            if (scrollViewer != null)
+                scrollViewer.ScrollToHome();
+        }
+
+        /// <summary>
+        /// Scrolls to the specified position in the document.
+        /// </summary>
+        public void ScrollToHorizontalOffset(double offset)
+        {
+            ApplyTemplate(); // ensure scrollViewer is created
+            if (scrollViewer != null)
+                scrollViewer.ScrollToHorizontalOffset(offset);
+        }
+
+        /// <summary>
+        /// Scrolls to the specified position in the document.
+        /// </summary>
+        public void ScrollToVerticalOffset(double offset)
+        {
+            ApplyTemplate(); // ensure scrollViewer is created
+            if (scrollViewer != null)
+                scrollViewer.ScrollToVerticalOffset(offset);
+        }
+
+        /// <summary>
+        /// Selects the entire text.
+        /// </summary>
+        public void SelectAll()
+        {
+            Execute(ApplicationCommands.SelectAll);
+        }
+
+        /// <summary>
+        /// Undoes the most recent command.
+        /// </summary>
+        /// <returns>True is the undo operation was successful, false is the undo stack is empty.</returns>
+        public bool Undo()
+        {
+            if (CanExecute(ApplicationCommands.Undo))
+            {
+                Execute(ApplicationCommands.Undo);
+                return true;
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Gets if the most recent undone command can be redone.
+        /// </summary>
+        public bool CanRedo
+        {
+            get { return CanExecute(ApplicationCommands.Redo); }
+        }
+
+        /// <summary>
+        /// Gets if the most recent command can be undone.
+        /// </summary>
+        public bool CanUndo
+        {
+            get { return CanExecute(ApplicationCommands.Undo); }
+        }
+
+        /// <summary>
+        /// Gets the vertical size of the document.
+        /// </summary>
+        public double ExtentHeight
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.ExtentHeight : 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets the horizontal size of the current document region.
+        /// </summary>
+        public double ExtentWidth
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.ExtentWidth : 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets the horizontal size of the viewport.
+        /// </summary>
+        public double ViewportHeight
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.ViewportHeight : 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets the horizontal size of the viewport.
+        /// </summary>
+        public double ViewportWidth
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.ViewportWidth : 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets the vertical scroll position.
+        /// </summary>
+        public double VerticalOffset
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.VerticalOffset : 0;
+            }
+        }
+
+        /// <summary>
+        /// Gets the horizontal scroll position.
+        /// </summary>
+        public double HorizontalOffset
+        {
+            get
+            {
+                return scrollViewer != null ? scrollViewer.HorizontalOffset : 0;
+            }
+        }
+        #endregion
+
+        #region TextBox methods
+        /// <summary>
+        /// Gets/Sets the selected text.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public string SelectedText
+        {
+            get
+            {
+                TextArea textArea = this.TextArea;
+                // We'll get the text from the whole surrounding segment.
+                // This is done to ensure that SelectedText.Length == SelectionLength.
+                if (textArea != null && textArea.Document != null && !textArea.Selection.IsEmpty)
+                    return textArea.Document.GetText(textArea.Selection.SurroundingSegment);
+                else
+                    return string.Empty;
+            }
+            set
+            {
+                if (value == null)
+                    throw new ArgumentNullException("value");
+                TextArea textArea = this.TextArea;
+                if (textArea != null && textArea.Document != null)
+                {
+                    int offset = this.SelectionStart;
+                    int length = this.SelectionLength;
+                    textArea.Document.Replace(offset, length, value);
+                    // keep inserted text selected
+                    textArea.Selection = SimpleSelection.Create(textArea, offset, offset + value.Length);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Gets/sets the caret position.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public int CaretOffset
+        {
+            get
+            {
+                TextArea textArea = this.TextArea;
+                if (textArea != null)
+                    return textArea.Caret.Offset;
+                else
+                    return 0;
+            }
+            set
+            {
+                TextArea textArea = this.TextArea;
+                if (textArea != null)
+                    textArea.Caret.Offset = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets/sets the start position of the selection.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public int SelectionStart
+        {
+            get
+            {
+                TextArea textArea = this.TextArea;
+                if (textArea != null)
+                {
+                    if (textArea.Selection.IsEmpty)
+                        return textArea.Caret.Offset;
+                    else
+                        return textArea.Selection.SurroundingSegment.Offset;
+                }
+                else
+                {
+                    return 0;
+                }
+            }
+            set
+            {
+                Select(value, SelectionLength);
+            }
+        }
+
+        /// <summary>
+        /// Gets/sets the length of the selection.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public int SelectionLength
+        {
+            get
+            {
+                TextArea textArea = this.TextArea;
+                if (textArea != null && !textArea.Selection.IsEmpty)
+                    return textArea.Selection.SurroundingSegment.Length;
+                else
+                    return 0;
+            }
+            set
+            {
+                Select(SelectionStart, value);
+            }
+        }
+
+        /// <summary>
+        /// Selects the specified text section.
+        /// </summary>
+        public void Select(int start, int length)
+        {
+            int documentLength = Document != null ? Document.TextLength : 0;
+
+            if (start < 0 || start > documentLength)
+            {
+                Debug.WriteLine(new ArgumentOutOfRangeException("start", start, "Value must be between 0 and " + documentLength));
+                return;
+            }
+
+            if (length < 0 || start + length > documentLength)
+            {
+                Debug.WriteLine(new ArgumentOutOfRangeException("length", length, "Value must be between 0 and " + (documentLength - length)));
+                return;
+            }
+
+            textArea.Selection = SimpleSelection.Create(textArea, start, start + length);
+            textArea.Caret.Offset = start + length;
+        }
+
+        /// <summary>
+        /// Gets the number of lines in the document.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public int LineCount
+        {
+            get
+            {
+                TextDocument document = this.Document;
+                if (document != null)
+                    return document.LineCount;
+                else
+                    return 1;
+            }
+        }
+
+        /// <summary>
+        /// Clears the text.
+        /// </summary>
+        public void Clear()
+        {
+            this.Text = string.Empty;
+        }
+        #endregion
+
+        #region Loading from stream
+        /// <summary>
+        /// Loads the text from the stream, auto-detecting the encoding.
+        /// </summary>
+        /// <remarks>
+        /// This method sets <see cref="IsModified"/> to false.
+        /// </remarks>
+        public void Load(Stream stream)
+        {
+            using (StreamReader reader = FileReader.OpenStream(stream, this.Encoding ?? Encoding.UTF8))
+            {
+                this.Text = reader.ReadToEnd();
+                this.Encoding = reader.CurrentEncoding; // assign encoding after ReadToEnd() so that the StreamReader can autodetect the encoding
+            }
+            this.IsModified = false;
+        }
+
+        /// <summary>
+        /// Loads the text from the stream, auto-detecting the encoding.
+        /// </summary>
+        public void Load(string fileName)
+        {
+            if (fileName == null)
+                throw new ArgumentNullException("fileName");
+            using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
+            {
+                Load(fs);
+            }
+        }
+
+        /// <summary>
+        /// Gets/sets the encoding used when the file is saved.
+        /// </summary>
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public Encoding Encoding { get; set; }
+
+        /// <summary>
+        /// Saves the text to the stream.
+        /// </summary>
+        /// <remarks>
+        /// This method sets <see cref="IsModified"/> to false.
+        /// </remarks>
+        public void Save(Stream stream)
+        {
+            if (stream == null)
+                throw new ArgumentNullException("stream");
+            StreamWriter writer = new StreamWriter(stream, this.Encoding ?? Encoding.UTF8);
+            writer.Write(this.Text);
+            writer.Flush();
+            // do not close the stream
+            this.IsModified = false;
+        }
+
+        /// <summary>
+        /// Saves the text to the file.
+        /// </summary>
+        public void Save(string fileName)
+        {
+            if (fileName == null)
+                throw new ArgumentNullException("fileName");
+            using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None))
+            {
+                Save(fs);
+            }
+        }
+        #endregion
+
+        #region MouseHover events
+        /// <summary>
+        /// The PreviewMouseHover event.
+        /// </summary>
+        public static readonly RoutedEvent PreviewMouseHoverEvent =
+            TextView.PreviewMouseHoverEvent.AddOwner(typeof(TextEditor));
+
+        /// <summary>
+        /// The MouseHover event.
+        /// </summary>
+        public static readonly RoutedEvent MouseHoverEvent =
+            TextView.MouseHoverEvent.AddOwner(typeof(TextEditor));
+
+
+        /// <summary>
+        /// The PreviewMouseHoverStopped event.
+        /// </summary>
+        public static readonly RoutedEvent PreviewMouseHoverStoppedEvent =
+            TextView.PreviewMouseHoverStoppedEvent.AddOwner(typeof(TextEditor));
+
+        /// <summary>
+        /// The MouseHoverStopped event.
+        /// </summary>
+        public static readonly RoutedEvent MouseHoverStoppedEvent =
+            TextView.MouseHoverStoppedEvent.AddOwner(typeof(TextEditor));
+
+
+        /// <summary>
+        /// Occurs when the mouse has hovered over a fixed location for some time.
+        /// </summary>
+        public event MouseEventHandler PreviewMouseHover
+        {
+            add { AddHandler(PreviewMouseHoverEvent, value); }
+            remove { RemoveHandler(PreviewMouseHoverEvent, value); }
+        }
+
+        /// <summary>
+        /// Occurs when the mouse has hovered over a fixed location for some time.
+        /// </summary>
+        public event MouseEventHandler MouseHover
+        {
+            add { AddHandler(MouseHoverEvent, value); }
+            remove { RemoveHandler(MouseHoverEvent, value); }
+        }
+
+        /// <summary>
+        /// Occurs when the mouse had previously hovered but now started moving again.
+        /// </summary>
+        public event MouseEventHandler PreviewMouseHoverStopped
+        {
+            add { AddHandler(PreviewMouseHoverStoppedEvent, value); }
+            remove { RemoveHandler(PreviewMouseHoverStoppedEvent, value); }
+        }
+
+        /// <summary>
+        /// Occurs when the mouse had previously hovered but now started moving again.
+        /// </summary>
+        public event MouseEventHandler MouseHoverStopped
+        {
+            add { AddHandler(MouseHoverStoppedEvent, value); }
+            remove { RemoveHandler(MouseHoverStoppedEvent, value); }
+        }
+        #endregion
+
+        #region ScrollBarVisibility
+        /// <summary>
+        /// Dependency property for <see cref="HorizontalScrollBarVisibility"/>
+        /// </summary>
+        public static readonly DependencyProperty HorizontalScrollBarVisibilityProperty = ScrollViewer.HorizontalScrollBarVisibilityProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(ScrollBarVisibility.Visible));
+
+        /// <summary>
+        /// Gets/Sets the horizontal scroll bar visibility.
+        /// </summary>
+        public ScrollBarVisibility HorizontalScrollBarVisibility
+        {
+            get { return (ScrollBarVisibility)GetValue(HorizontalScrollBarVisibilityProperty); }
+            set { SetValue(HorizontalScrollBarVisibilityProperty, value); }
+        }
+
+        /// <summary>
+        /// Dependency property for <see cref="VerticalScrollBarVisibility"/>
+        /// </summary>
+        public static readonly DependencyProperty VerticalScrollBarVisibilityProperty = ScrollViewer.VerticalScrollBarVisibilityProperty.AddOwner(typeof(TextEditor), new FrameworkPropertyMetadata(ScrollBarVisibility.Visible));
+
+        /// <summary>
+        /// Gets/Sets the vertical scroll bar visibility.
+        /// </summary>
+        public ScrollBarVisibility VerticalScrollBarVisibility
+        {
+            get { return (ScrollBarVisibility)GetValue(VerticalScrollBarVisibilityProperty); }
+            set { SetValue(VerticalScrollBarVisibilityProperty, value); }
+        }
+        #endregion
+
+        object IServiceProvider.GetService(Type serviceType)
+        {
+            return textArea.GetService(serviceType);
+        }
+
+        /// <summary>
+        /// Gets the text view position from a point inside the editor.
+        /// </summary>
+        /// <param name="point">The position, relative to top left
+        /// corner of TextEditor control</param>
+        /// <returns>The text view position, or null if the point is outside the document.</returns>
+        public TextViewPosition? GetPositionFromPoint(Point point)
+        {
+            if (this.Document == null)
+                return null;
+            TextView textView = this.TextArea.TextView;
+            return textView.GetPosition(TranslatePoint(point, textView) + textView.ScrollOffset);
+        }
+
+        /// <summary>
+        /// Scrolls to the specified line.
+        /// This method requires that the TextEditor was already assigned a size (WPF layout must have run prior).
+        /// </summary>
+        public void ScrollToLine(int line)
+        {
+            ScrollTo(line, -1);
+        }
+
+        /// <summary>
+        /// Scrolls to the specified line/column.
+        /// This method requires that the TextEditor was already assigned a size (WPF layout must have run prior).
+        /// </summary>
+        public void ScrollTo(int line, int column)
+        {
+            const double MinimumScrollPercentage = 0.3;
+
+            TextView textView = textArea.TextView;
+            TextDocument document = textView.Document;
+            if (scrollViewer != null && document != null)
+            {
+                if (line < 1)
+                    line = 1;
+                if (line > document.LineCount)
+                    line = document.LineCount;
+
+                IScrollInfo scrollInfo = textView;
+                if (!scrollInfo.CanHorizontallyScroll)
+                {
+                    // Word wrap is enabled. Ensure that we have up-to-date info about line height so that we scroll
+                    // to the correct position.
+                    // This avoids that the user has to repeat the ScrollTo() call several times when there are very long lines.
+                    VisualLine vl = textView.GetOrConstructVisualLine(document.GetLineByNumber(line));
+                    double remainingHeight = scrollViewer.ViewportHeight / 2;
+                    while (remainingHeight > 0)
+                    {
+                        DocumentLine prevLine = vl.FirstDocumentLine.PreviousLine;
+                        if (prevLine == null)
+                            break;
+                        vl = textView.GetOrConstructVisualLine(prevLine);
+                        remainingHeight -= vl.Height;
+                    }
+                }
+
+                Point p = textArea.TextView.GetVisualPosition(new TextViewPosition(line, Math.Max(1, column)), VisualYPosition.LineMiddle);
+                double verticalPos = p.Y - scrollViewer.ViewportHeight / 2;
+                if (Math.Abs(verticalPos - scrollViewer.VerticalOffset) > MinimumScrollPercentage * scrollViewer.ViewportHeight)
+                {
+                    scrollViewer.ScrollToVerticalOffset(Math.Max(0, verticalPos));
+                }
+                if (column > 0)
+                {
+                    if (p.X > scrollViewer.ViewportWidth - Caret.MinimumDistanceToViewBorder * 2)
+                    {
+                        double horizontalPos = Math.Max(0, p.X - scrollViewer.ViewportWidth / 2);
+                        if (Math.Abs(horizontalPos - scrollViewer.HorizontalOffset) > MinimumScrollPercentage * scrollViewer.ViewportWidth)
+                        {
+                            scrollViewer.ScrollToHorizontalOffset(horizontalPos);
+                        }
+                    }
+                    else
+                    {
+                        scrollViewer.ScrollToHorizontalOffset(0);
+                    }
+                }
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Themes/Generic.xaml b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Themes/Generic.xaml
index ce5cb39e1..5de763df3 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Themes/Generic.xaml
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Themes/Generic.xaml
@@ -47,12 +47,19 @@
     <BitmapImage x:Key="namespace" UriSource="pack://application:,,,/Tango.Scripting.Editors;component/Images/namespace.png" />
     <BitmapImage x:Key="method" UriSource="pack://application:,,,/Tango.Scripting.Editors;component/Images/method.png" />
     <BitmapImage x:Key="property" UriSource="pack://application:,,,/Tango.Scripting.Editors;component/Images/property.png" />
+    <BitmapImage x:Key="event" UriSource="pack://application:,,,/Tango.Scripting.Editors;component/Images/event.png" />
+    <BitmapImage x:Key="snippet" UriSource="pack://application:,,,/Tango.Scripting.Editors;component/Images/snippet.png" />
 
     <!--Converters-->
     <converters:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
     <converters:BooleanToVisibilityInversedConverter x:Key="BooleanToVisibilityInversedConverter" />
 
     <Style TargetType="{x:Type completion:CompletionList}">
+        <Style.Resources>
+            <Style TargetType="ToolTip">
+                
+            </Style>
+        </Style.Resources>
         <Setter Property="Background" Value="{StaticResource CompletionBackgroundBrush}"></Setter>
         <Setter Property="BorderThickness" Value="0"></Setter>
 
@@ -83,95 +90,6 @@
                                                         <Setter.Value>
                                                             <DataTemplate>
                                                                 <Border Background="{StaticResource CompletionToolTipBackgroundBrush}" CornerRadius="3" BorderThickness="0.5" BorderBrush="#434343" Padding="10 5" TextElement.Foreground="{StaticResource ScriptForegroundBrush}" TextElement.FontSize="12">
-                                                                    <!--<ContentControl Content="{Binding}">
-                                                                        <ContentControl.Style>
-                                                                            <Style TargetType="ContentControl">
-                                                                                <Setter Property="ContentTemplate">
-                                                                                    <Setter.Value>
-                                                                                        <DataTemplate>
-                                                                                            <ContentPresenter Content="{Binding PopupControl}" />
-                                                                                        </DataTemplate>
-                                                                                    </Setter.Value>
-                                                                                </Setter>
-                                                                                <Style.Triggers>
-                                                                                    <DataTrigger Binding="{Binding Type}" Value="method">
-                                                                                        <Setter Property="ContentTemplate">
-                                                                                            <Setter.Value>
-                                                                                                <DataTemplate>
-                                                                                                    <StackPanel>
-                                                                                                        <StackPanel Orientation="Horizontal">
-                                                                                                            <TextBlock Text="{Binding ReturnType}" Foreground="{StaticResource ScriptReferenceTypesBrush}"></TextBlock>
-                                                                                                            <TextBlock Margin="5 0 0 0" Text="{Binding Class}" Foreground="{StaticResource ScriptReferenceTypesBrush}"></TextBlock>
-                                                                                                            <TextBlock>.</TextBlock>
-                                                                                                            <TextBlock Text="{Binding Text}"></TextBlock>
-                                                                                                            <TextBlock>(</TextBlock>
-                                                                                                            <ItemsControl ItemsSource="{Binding Parameters}">
-                                                                                                                <ItemsControl.ItemsPanel>
-                                                                                                                    <ItemsPanelTemplate>
-                                                                                                                        <StackPanel Orientation="Horizontal"></StackPanel>
-                                                                                                                    </ItemsPanelTemplate>
-                                                                                                                </ItemsControl.ItemsPanel>
-                                                                                                                <ItemsControl.ItemTemplate>
-                                                                                                                    <DataTemplate>
-                                                                                                                        <StackPanel Orientation="Horizontal">
-                                                                                                                            <TextBlock Text="{Binding Type.Name}" Foreground="{StaticResource ScriptReferenceTypesBrush}"></TextBlock>
-                                                                                                                            <TextBlock Margin="5 0 0 0" Text="{Binding Name}"></TextBlock>
-                                                                                                                            <TextBlock Margin="0 0 5 0" Text="," Visibility="{Binding IsLast,Converter={StaticResource BooleanToVisibilityInversedConverter}}"></TextBlock>
-                                                                                                                        </StackPanel>
-                                                                                                                    </DataTemplate>
-                                                                                                                </ItemsControl.ItemTemplate>
-                                                                                                            </ItemsControl>
-                                                                                                            <TextBlock>)</TextBlock>
-
-                                                                                                            <StackPanel Margin="5 0 0 0" Orientation="Horizontal" Visibility="{Binding HasOverloads,Converter={StaticResource BooleanToVisibilityConverter}}">
-                                                                                                                <TextBlock>(+</TextBlock>
-                                                                                                                <TextBlock Margin="2 0" Text="{Binding Overloads}"></TextBlock>
-                                                                                                                <TextBlock>overloads)</TextBlock>
-                                                                                                            </StackPanel>
-                                                                                                        </StackPanel>
-
-                                                                                                        <TextBlock Text="{Binding Description}"></TextBlock>
-                                                                                                    </StackPanel>
-                                                                                                </DataTemplate>
-                                                                                            </Setter.Value>
-                                                                                        </Setter>
-                                                                                    </DataTrigger>
-
-                                                                                    <DataTrigger Binding="{Binding Type}" Value="property">
-                                                                                        <Setter Property="ContentTemplate">
-                                                                                            <Setter.Value>
-                                                                                                <DataTemplate>
-                                                                                                    <StackPanel>
-                                                                                                        <StackPanel Orientation="Horizontal">
-                                                                                                            <TextBlock Text="{Binding ReturnType}" Foreground="{StaticResource ScriptReferenceTypesBrush}"></TextBlock>
-                                                                                                            <TextBlock Margin="5 0 0 0" Text="{Binding Class}" Foreground="{StaticResource ScriptReferenceTypesBrush}"></TextBlock>
-                                                                                                            <TextBlock>.</TextBlock>
-                                                                                                            <TextBlock Text="{Binding Text}"></TextBlock>
-                                                                                                            <TextBlock Margin="5 0 0 0">
-                                                                                                                <Run>{</Run>
-                                                                                                                <Run Foreground="{StaticResource ScriptKeywordBrush}">get</Run><Run>;</Run>
-                                                                                                                <Run Foreground="{StaticResource ScriptKeywordBrush}">set</Run><Run>;</Run>
-                                                                                                                <Run>}</Run>
-                                                                                                            </TextBlock>
-                                                                                                        </StackPanel>
-
-                                                                                                        <TextBlock Text="{Binding Description}"></TextBlock>
-                                                                                                    </StackPanel>
-                                                                                                </DataTemplate>
-                                                                                            </Setter.Value>
-                                                                                        </Setter>
-                                                                                    </DataTrigger>
-                                                                                </Style.Triggers>
-                                                                            </Style>
-                                                                        </ContentControl.Style>
-
-                                                                        <ContentControl.ContentTemplate>
-                                                                            <DataTemplate>
-                                                                                <ContentPresenter Content="{Binding PopupControl}" />
-                                                                            </DataTemplate>
-                                                                        </ContentControl.ContentTemplate>
-                                                                    </ContentControl>-->
-
                                                                     <ContentPresenter DataContext="{Binding}" Content="{Binding PopupControl}" />
                                                                 </Border>
                                                             </DataTemplate>
@@ -223,6 +141,15 @@
         <Setter Property="Control.Cursor" Value="/Tango.Scripting.Editors;component/themes/RightArrow.cur"/>
     </Style>
 
+    <Style TargetType="{x:Type local:XamlEditor}">
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"></Setter>
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"></Setter>
+        <Setter Property="FontFamily" Value="Consolas"></Setter>
+        <Setter Property="FontSize" Value="13"></Setter>
+        <Setter Property="SyntaxHighlighting" Value="XML"></Setter>
+        <Setter Property="ShowLineNumbers" Value="True"></Setter>        
+    </Style>
+    
     <Style TargetType="{x:Type local:ScriptEditor}">
         <Setter Property="Background" Value="{StaticResource ScriptBackgroundBrush}"></Setter>
         <Setter Property="Foreground" Value="{StaticResource ScriptForegroundBrush}"></Setter>
@@ -567,4 +494,6 @@
             </Setter.Value>
         </Setter>
     </Style>
+    
+    
 </ResourceDictionary>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/XamlEditor.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/XamlEditor.cs
new file mode 100644
index 000000000..22b425ba2
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/XamlEditor.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Tango.Scripting.Editors
+{
+    public class XamlEditor : TextEditor
+    {
+        private bool preventCodeUpdate;
+
+        public String Xaml
+        {
+            get { return (String)GetValue(XamlProperty); }
+            set { SetValue(XamlProperty, value); }
+        }
+        public static readonly DependencyProperty XamlProperty =
+            DependencyProperty.Register("Xaml", typeof(String), typeof(XamlEditor), new PropertyMetadata(null, (d, e) => (d as XamlEditor).OnXamlChanged()));
+
+        public XamlEditor()
+        {
+            TextChanged += XamlEditor_TextChanged;
+        }
+
+        private void XamlEditor_TextChanged(object sender, EventArgs e)
+        {
+            if (!preventCodeUpdate)
+            {
+                preventCodeUpdate = true;
+                Xaml = Text;
+                preventCodeUpdate = false;
+            }
+        }
+
+        private void OnXamlChanged()
+        {
+            if (!preventCodeUpdate)
+            {
+                preventCodeUpdate = true;
+                Text = Xaml;
+                preventCodeUpdate = false;
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/app.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/app.config
index d3a17b4de..16d75cf59 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/app.config
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/app.config
@@ -77,6 +77,14 @@
  
           </dependentAssembly>
  
+          <dependentAssembly>
+ 
+              <assemblyIdentity name="Microsoft.IdentityModel.Clients.ActiveDirectory" publicKeyToken="31bf3856ad364e35" culture="neutral" />
+ 
+              <bindingRedirect oldVersion="0.0.0.0-5.0.5.0" newVersion="5.0.5.0" />
+ 
+          </dependentAssembly>
+ 
       </assemblyBinding>
  
   </runtime>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/packages.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/packages.config
index 00eef19db..a0f62a1d4 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/packages.config
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/packages.config
@@ -4,6 +4,7 @@
   <package id="Microsoft.CodeAnalysis.Analyzers" version="1.1.0" targetFramework="net461" />
   <package id="Microsoft.CodeAnalysis.Common" version="2.4.0" targetFramework="net461" />
   <package id="Microsoft.CodeAnalysis.CSharp" version="2.4.0" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
   <package id="System.AppContext" version="4.3.0" targetFramework="net461" />
   <package id="System.Collections" version="4.3.0" targetFramework="net461" />
   <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="net461" />
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/CodeFormatter.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/CodeFormatter.cs
new file mode 100644
index 000000000..c933f7e09
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/CodeFormatter.cs
@@ -0,0 +1,61 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Formatting;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tango.Scripting.Formatting
+{
+    public static class CodeFormatter
+    {
+        public static String Format(String code)
+        {
+            SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
+            CompilationUnitSyntax root = tree.GetCompilationUnitRoot();
+
+            //var node = ApplyBraceNewLineRule(root);
+            //node = ApplyCopyrightHeaderRule(node);
+            //node = ApplyNewLineAboveRule(node);
+            //node = ApplyUsingLocationRule(node);
+
+            //Just to make VS copy the dll to output folder.
+            Microsoft.CodeAnalysis.CSharp.Formatting.BinaryOperatorSpacingOptions a = Microsoft.CodeAnalysis.CSharp.Formatting.BinaryOperatorSpacingOptions.Ignore;
+
+            var node = Formatter.Format(root, new AdhocWorkspace()); 
+
+            return node.ToString();
+        }
+
+        //private static SyntaxNode ApplyUsingLocationRule(SyntaxNode node)
+        //{
+        //    UsingLocationRule rule = new UsingLocationRule();
+        //    return rule.Process(node, "CSharp");
+        //}
+
+        //private static SyntaxNode ApplyBraceNewLineRule(SyntaxNode node)
+        //{
+        //    BraceNewLineRule rule = new BraceNewLineRule();
+        //    return rule.Process(node, "CSharp");
+        //}
+
+        //private static SyntaxNode ApplyNewLineAboveRule(SyntaxNode node)
+        //{
+        //    NewLineAboveRule rule = new NewLineAboveRule();
+        //    return rule.Process(node, "CSharp");
+        //}
+
+        //private static SyntaxNode ApplyCopyrightHeaderRule(SyntaxNode node)
+        //{
+        //    CopyrightHeaderRule rule = new CopyrightHeaderRule(new Microsoft.DotNet.CodeFormatting.Options()
+        //    {
+
+        //    });
+
+        //    return rule.ProcessCSharp(node);
+        //}
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Properties/AssemblyInfo.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Properties/AssemblyInfo.cs
new file mode 100644
index 000000000..5436fc65e
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Tango.Scripting.Formatting")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Tango.Scripting.Formatting")]
+[assembly: AssemblyCopyright("Copyright ©  2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("8d8f06ed-7f75-4933-b0c5-829b0ff654d0")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Tango.Scripting.Formatting.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Tango.Scripting.Formatting.csproj
new file mode 100644
index 000000000..4e5b927b0
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/Tango.Scripting.Formatting.csproj
@@ -0,0 +1,160 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{8D8F06ED-7F75-4933-B0C5-829B0FF654D0}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Tango.Scripting.Formatting</RootNamespace>
+    <AssemblyName>Tango.Scripting.Formatting</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Esent.Interop, Version=1.9.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\ManagedEsent.1.9.4\lib\net40\Esent.Interop.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Common.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.CSharp, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.CSharp.Scripting, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.Scripting.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.Scripting.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.CSharp.Workspaces, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.CSharp.Workspaces.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.CSharp.Workspaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.Scripting, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Scripting.Common.2.4.0\lib\netstandard1.3\Microsoft.CodeAnalysis.Scripting.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.Workspaces, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Workspaces.Common.2.4.0\lib\net46\Microsoft.CodeAnalysis.Workspaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.CodeAnalysis.Workspaces.Desktop, Version=2.4.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.CodeAnalysis.Workspaces.Common.2.4.0\lib\net46\Microsoft.CodeAnalysis.Workspaces.Desktop.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.AppContext, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.AppContext.4.3.0\lib\net46\System.AppContext.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Collections.Immutable, Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Collections.Immutable.1.3.1\lib\portable-net45+win8+wp8+wpa81\System.Collections.Immutable.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ComponentModel.Composition" />
+    <Reference Include="System.Composition.AttributedModel, Version=1.0.31.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Composition.AttributedModel.1.0.31\lib\portable-net45+win8+wp8+wpa81\System.Composition.AttributedModel.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Composition.Convention, Version=1.0.31.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Composition.Convention.1.0.31\lib\portable-net45+win8+wp8+wpa81\System.Composition.Convention.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Composition.Hosting, Version=1.0.31.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Composition.Hosting.1.0.31\lib\portable-net45+win8+wp8+wpa81\System.Composition.Hosting.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Composition.Runtime, Version=1.0.31.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Composition.Runtime.1.0.31\lib\portable-net45+win8+wp8+wpa81\System.Composition.Runtime.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Composition.TypedParts, Version=1.0.31.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Composition.TypedParts.1.0.31\lib\portable-net45+win8+wp8+wpa81\System.Composition.TypedParts.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Console, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Console.4.3.0\lib\net46\System.Console.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Core" />
+    <Reference Include="System.Diagnostics.FileVersionInfo, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Diagnostics.FileVersionInfo.4.3.0\lib\net46\System.Diagnostics.FileVersionInfo.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Diagnostics.StackTrace, Version=4.0.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Diagnostics.StackTrace.4.3.0\lib\net46\System.Diagnostics.StackTrace.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.Compression, Version=4.1.2.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.Compression.4.3.0\lib\net46\System.IO.Compression.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.FileSystem, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.FileSystem.4.3.0\lib\net46\System.IO.FileSystem.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO.FileSystem.Primitives, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.IO.FileSystem.Primitives.4.3.0\lib\net46\System.IO.FileSystem.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Reflection.Metadata, Version=1.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Reflection.Metadata.1.4.2\lib\portable-net45+win8\System.Reflection.Metadata.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Algorithms, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Algorithms.4.3.0\lib\net461\System.Security.Cryptography.Algorithms.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Encoding, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Encoding.4.3.0\lib\net46\System.Security.Cryptography.Encoding.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.Primitives, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.Primitives.4.3.0\lib\net46\System.Security.Cryptography.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Security.Cryptography.X509Certificates, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Security.Cryptography.X509Certificates.4.3.0\lib\net461\System.Security.Cryptography.X509Certificates.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Encoding.CodePages, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Text.Encoding.CodePages.4.3.0\lib\net46\System.Text.Encoding.CodePages.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Thread, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Threading.Thread.4.3.0\lib\net46\System.Threading.Thread.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ValueTuple, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.ValueTuple.4.3.0\lib\netstandard1.0\System.ValueTuple.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Xml.ReaderWriter, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.ReaderWriter.4.3.0\lib\net46\System.Xml.ReaderWriter.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XmlDocument, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XmlDocument.4.3.0\lib\net46\System.Xml.XmlDocument.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XPath, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XPath.4.3.0\lib\net46\System.Xml.XPath.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.XPath.XDocument, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Xml.XPath.XDocument.4.3.0\lib\net46\System.Xml.XPath.XDocument.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="CodeFormatter.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.Analyzers.dll" />
+    <Analyzer Include="..\..\packages\Microsoft.CodeAnalysis.Analyzers.1.1.0\analyzers\dotnet\cs\Microsoft.CodeAnalysis.CSharp.Analyzers.dll" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/app.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/app.config
new file mode 100644
index 000000000..9da0b3b67
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/app.config
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-1.2.1.0" newVersion="1.2.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO.Compression" publicKeyToken="b77a5c561934e089" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.2.0" newVersion="4.1.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
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+        <bindingRedirect oldVersion="0.0.0.0-4.1.0.0" newVersion="4.1.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
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+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO.FileSystem.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Security.Cryptography.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Xml.XPath.XDocument" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Console" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Diagnostics.StackTrace" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Thread" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/packages.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/packages.config
new file mode 100644
index 000000000..6844de8c2
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Formatting/packages.config
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="ManagedEsent" version="1.9.4" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Analyzers" version="1.1.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Common" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.CSharp" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.CSharp.Scripting" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.CSharp.Workspaces" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Scripting" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Scripting.Common" version="2.4.0" targetFramework="net461" />
+  <package id="Microsoft.CodeAnalysis.Workspaces.Common" version="2.4.0" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
+  <package id="System.AppContext" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="net461" />
+  <package id="System.Collections.Immutable" version="1.3.1" targetFramework="net461" />
+  <package id="System.Composition" version="1.0.31" targetFramework="net461" />
+  <package id="System.Composition.AttributedModel" version="1.0.31" targetFramework="net461" />
+  <package id="System.Composition.Convention" version="1.0.31" targetFramework="net461" />
+  <package id="System.Composition.Hosting" version="1.0.31" targetFramework="net461" />
+  <package id="System.Composition.Runtime" version="1.0.31" targetFramework="net461" />
+  <package id="System.Composition.TypedParts" version="1.0.31" targetFramework="net461" />
+  <package id="System.Console" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.Debug" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.FileVersionInfo" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.StackTrace" version="4.3.0" targetFramework="net461" />
+  <package id="System.Diagnostics.Tools" version="4.3.0" targetFramework="net461" />
+  <package id="System.Dynamic.Runtime" version="4.3.0" targetFramework="net461" />
+  <package id="System.Globalization" version="4.3.0" targetFramework="net461" />
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+  <package id="System.IO.FileSystem" version="4.3.0" targetFramework="net461" />
+  <package id="System.IO.FileSystem.Primitives" version="4.3.0" targetFramework="net461" />
+  <package id="System.Linq" version="4.3.0" targetFramework="net461" />
+  <package id="System.Linq.Expressions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Reflection.Metadata" version="1.4.2" targetFramework="net461" />
+  <package id="System.Resources.ResourceManager" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="net461" />
+  <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Algorithms" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding.CodePages" version="4.3.0" targetFramework="net461" />
+  <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Tasks.Parallel" version="4.3.0" targetFramework="net461" />
+  <package id="System.Threading.Thread" version="4.3.0" targetFramework="net461" />
+  <package id="System.ValueTuple" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.ReaderWriter" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XDocument" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XmlDocument" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XPath" version="4.3.0" targetFramework="net461" />
+  <package id="System.Xml.XPath.XDocument" version="4.3.0" targetFramework="net461" />
+</packages>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.config b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.config
new file mode 100644
index 000000000..731f6de6c
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml
new file mode 100644
index 000000000..731c7f907
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="Tango.Scripting.Test.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:Tango.Scripting.Test"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml.cs
new file mode 100644
index 000000000..e1965607a
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/App.xaml.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Tango.Scripting.Test
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml
new file mode 100644
index 000000000..c1d784f10
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml
@@ -0,0 +1,38 @@
+<Window x:Class="Tango.Scripting.Test.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:scripting="clr-namespace:Tango.Scripting.Editors;assembly=Tango.Scripting.Editors"
+        xmlns:local="clr-namespace:Tango.Scripting.Test"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800" d:DataContext="{d:DesignInstance Type={x:Type local:MainWindowVM},IsDesignTimeCreatable=False}">
+    <Grid>
+        <DockPanel>
+            <Menu DockPanel.Dock="Top" IsMainMenu="True">
+                <MenuItem Header="File">
+                    <MenuItem Header="Add Script" Command="{Binding AddScriptCommand}"></MenuItem>
+                </MenuItem>
+                <MenuItem Header="Debug">
+                    <MenuItem Header="Run" Command="{Binding RunCommand}"></MenuItem>
+                </MenuItem>
+            </Menu>
+
+            <TabControl ItemsSource="{Binding Project.Scripts}" SelectedIndex="0">
+                <TabControl.ItemTemplate>
+                    <DataTemplate>
+                        <TextBlock Text="{Binding Name}"></TextBlock>
+                    </DataTemplate>
+                </TabControl.ItemTemplate>
+                <TabControl.ContentTemplate>
+                    <DataTemplate>
+                        <scripting:ScriptEditor 
+                            ReferenceAssemblies="{Binding RelativeSource={RelativeSource AncestorType=Window},Path=DataContext.Project.ReferenceAssembliesLoaded}" 
+                            AdditionalScripts="{Binding RelativeSource={RelativeSource AncestorType=Window},Path=DataContext.Project.AdditionalScripts}"
+                            Code="{Binding Code,Mode=TwoWay}" />
+                    </DataTemplate>
+                </TabControl.ContentTemplate>
+            </TabControl>
+        </DockPanel>
+    </Grid>
+</Window>
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml.cs
new file mode 100644
index 000000000..58a695c10
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindow.xaml.cs
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Forms;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using Tango.Scripting.Editors;
+
+namespace Tango.Scripting.Test
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            ScriptEditor.LoadingSymbolsProgress += ScriptEditor_AssemblyCacheProgress;
+
+            InitializeComponent();
+            DataContext = new MainWindowVM();
+        }
+
+        private void ScriptEditor_AssemblyCacheProgress(object sender, Tango.Core.TangoProgressChangedEventArgs<int> e)
+        {
+            Debug.WriteLine(e.Progress.ToString());
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindowVM.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindowVM.cs
new file mode 100644
index 000000000..f57de886f
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/MainWindowVM.cs
@@ -0,0 +1,69 @@
+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using Tango.Core.Commands;
+using Tango.Scripting.Basic;
+using Tango.SharedUI;
+
+namespace Tango.Scripting.Test
+{
+    public class TestContext : IContext
+    {
+
+    }
+
+    public class MainWindowVM : ViewModel
+    {
+
+        public RelayCommand AddScriptCommand { get; set; }
+        public RelayCommand RunCommand { get; set; }
+
+        private Project<TestContext> _project;
+        public Project<TestContext> Project
+        {
+            get { return _project; }
+            set { _project = value; RaisePropertyChangedAuto(); }
+        }
+
+        public MainWindowVM()
+        {
+            Project = Project<TestContext>.New("untitled");
+            Project.Scripts.Add(Script.New("main.csx", Encoding.Default.GetString(Properties.Resources.template), true));
+            AddScriptCommand = new RelayCommand(AddScriptFile);
+            RunCommand = new RelayCommand(RunProject);
+        }
+
+        private void AddScriptFile()
+        {
+            OpenFileDialog dlg = new OpenFileDialog();
+            dlg.Filter = "CSharp Script|*.csx";
+            if (dlg.ShowDialog().Value)
+            {
+                AddScript(dlg.FileName);
+            }
+        }
+
+        private void AddScript(String file)
+        {
+            Project.Scripts.Add(Script.New(file));
+        }
+
+        private async void RunProject()
+        {
+            var session = await Project.Run(null);
+
+            session.StateChanged += (x, e) => 
+            {
+                if (e.State == ProjectSessionState.Completed)
+                {
+                    MessageBox.Show(e.ReturnValue.ToString());
+                }
+            };
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/AssemblyInfo.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/AssemblyInfo.cs
new file mode 100644
index 000000000..f85cc741b
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/AssemblyInfo.cs
@@ -0,0 +1,55 @@
+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Tango.Scripting.Test")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Tango.Scripting.Test")]
+[assembly: AssemblyCopyright("Copyright ©  2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.Designer.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.Designer.cs
new file mode 100644
index 000000000..3cc3d2906
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.Designer.cs
@@ -0,0 +1,73 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Tango.Scripting.Test.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "15.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Tango.Scripting.Test.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] template {
+            get {
+                object obj = ResourceManager.GetObject("template", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.resx b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.resx
new file mode 100644
index 000000000..37de48988
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Resources.resx
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="template" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\template.csx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+</root>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.Designer.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.Designer.cs
new file mode 100644
index 000000000..05e12ac76
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.Designer.cs
@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Tango.Scripting.Test.Properties
+{
+
+
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.settings b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.settings
new file mode 100644
index 000000000..033d7a5e9
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Properties/Settings.settings
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="uri:settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Resources/template.csx b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Resources/template.csx
new file mode 100644
index 000000000..524b1bb24
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Resources/template.csx
@@ -0,0 +1,18 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Tango.Scripting.Basic;
+
+public class Program
+{
+    public object OnExecute(IContext context)
+    {
+
+
+        return new
+        {
+            Item1 = "1",
+            Item2 = "2"
+        };
+    }
+}
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Tango.Scripting.Test.csproj b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Tango.Scripting.Test.csproj
new file mode 100644
index 000000000..46c6d6453
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/Tango.Scripting.Test.csproj
@@ -0,0 +1,132 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{564A30E2-E681-422A-9528-3E8CE301B837}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>Tango.Scripting.Test</RootNamespace>
+    <AssemblyName>Tango.Scripting.Test</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <WarningLevel>4</WarningLevel>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <DocumentationFile>
+    </DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xaml">
+      <RequiredTargetFramework>4.0</RequiredTargetFramework>
+    </Reference>
+    <Reference Include="WindowsBase" />
+    <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
+  </ItemGroup>
+  <ItemGroup>
+    <ApplicationDefinition Include="App.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </ApplicationDefinition>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <Page Include="MainWindow.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+    <Compile Include="App.xaml.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="MainWindow.xaml.cs">
+      <DependentUpon>MainWindow.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainWindowVM.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <None Include="lib.csx" />
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <None Include="Resources\template.csx" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\Tango.Core\Tango.Core.csproj">
+      <Project>{a34ee0f0-649d-41c8-8489-b6f1cc6924ee}</Project>
+      <Name>Tango.Core</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Tango.SharedUI\Tango.SharedUI.csproj">
+      <Project>{8491d07b-c1f6-4b62-a412-41b9fd2d6538}</Project>
+      <Name>Tango.SharedUI</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Basic\Tango.Scripting.Basic.csproj">
+      <Project>{2b29a699-1d65-463a-8250-a2ce81d019c9}</Project>
+      <Name>Tango.Scripting.Basic</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Core\Tango.Scripting.Core.csproj">
+      <Project>{5812e1c6-abaa-4066-94ac-971c27b4f46a}</Project>
+      <Name>Tango.Scripting.Core</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Tango.Scripting.Editors\Tango.Scripting.Editors.csproj">
+      <Project>{da62fa39-668b-47a6-b0f2-d2c1daf777b0}</Project>
+      <Name>Tango.Scripting.Editors</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="FontAwesome.WPF">
+      <Version>4.7.0.9</Version>
+    </PackageReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Test/lib.csx b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/lib.csx
new file mode 100644
index 000000000..bada6e745
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Test/lib.csx
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+public class MyClass
+{
+    public String Do()
+    {
+        return "Hi From Lib";
+    }
+}
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptParser.cs b/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptParser.cs
index 15760c950..63d2cca5d 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptParser.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptParser.cs
@@ -131,16 +131,55 @@ namespace Tango.Scripting.Parsing
 
                     if (prop != null)
                     {
-                        vars.Add(new ScriptSymbol()
+                        var type = ReplaceFakeScript(prop.GetValue(symbol).ToString());
+
+                        ScriptSymbol varSymbol = new ScriptSymbol();
+                        varSymbol.Name = symbol.Name;
+                        varSymbol.Type = type;
+                        varSymbol.Class = ReplaceFakeScript(symbol.ContainingType?.Name);
+                        varSymbol.Kind = symbol.Kind;
+                        varSymbol.RealSymbol = symbol;
+                        varSymbol.Accessibility = symbol.DeclaredAccessibility;
+                        varSymbol.ContainingNamespace = ReplaceFakeScript(symbol.ContainingNamespace?.Name);
+                        varSymbol.Summary = GetSymbolDocumentation(symbol);
+
+                        try
                         {
-                            Name = symbol.Name,
-                            Type = ReplaceFakeScript(prop.GetValue(symbol).ToString()),
-                            Class = ReplaceFakeScript(symbol.ContainingType?.Name),
-                            Kind = symbol.Kind,
-                            Accessibility = symbol.DeclaredAccessibility,
-                            ContainingNamespace = ReplaceFakeScript(symbol.ContainingNamespace?.Name),
-                            Summary = GetSymbolDocumentation(symbol),
-                        });
+                            if (symbol.Kind == SymbolKind.Local && symbol.DeclaringSyntaxReferences.Count() > 0)
+                            {
+                                var node = symbol.DeclaringSyntaxReferences.First().GetSyntax() as VariableDeclaratorSyntax;
+
+                                if (node != null)
+                                {
+                                    varSymbol.IsUnassigned = node.Initializer == null;
+                                }
+                            }
+                        }
+                        catch { }
+
+                        try
+                        {
+                            varSymbol.Offset = symbol.Locations[0].SourceSpan.Start;
+                            varSymbol.Length = symbol.Locations[0].SourceSpan.Length;
+                        }
+                        catch { }
+
+                        vars.Add(varSymbol);
+
+                        if (type == "?")
+                        {
+                            try
+                            {
+                                var variables = GetScriptVariables(code);
+                                var variable = variables.FirstOrDefault(x => x.Name == symbol.Name);
+
+                                if (variable != null)
+                                {
+                                    varSymbol.Type = variable.Type;
+                                }
+                            }
+                            catch { }
+                        }
                     }
                 }
             }
@@ -258,7 +297,21 @@ namespace Tango.Scripting.Parsing
         {
             SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
             CompilationUnitSyntax root = tree.GetCompilationUnitRoot();
-            return root.DescendantNodes().OfType<ObjectCreationExpressionSyntax>().FirstOrDefault();
+            var creationSyntax = root.DescendantNodes().OfType<ObjectCreationExpressionSyntax>().FirstOrDefault();
+            return creationSyntax;
+        }
+
+        public MethodDeclarationSyntax GetCurrentConstructionExpressionAlt(String code)
+        {
+            if (code.Contains("=") && code.Contains("new"))
+            {
+                SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
+                CompilationUnitSyntax root = tree.GetCompilationUnitRoot();
+                var creationSyntax = root.DescendantNodes().OfType<MethodDeclarationSyntax>().FirstOrDefault();
+                return creationSyntax;
+            }
+
+            return null;
         }
 
         public T GetExpressionFirst<T>(String line) where T : CSharpSyntaxNode
@@ -378,5 +431,72 @@ namespace Tango.Scripting.Parsing
             var ret = root.ToFullString();
             return ret;
         }
+
+        private List<ScriptVariable> GetScriptVariables(String code)
+        {
+            List<ScriptVariable> vars = new List<ScriptVariable>();
+
+            SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
+            var root = (CompilationUnitSyntax)tree.GetRoot();
+
+            List<VariableDeclaratorSyntax> variables = new List<VariableDeclaratorSyntax>();
+            FillVariables(variables, new List<SyntaxNode>(), root.Members[0]);
+            variables = variables.Distinct().ToList();
+
+            foreach (var item in variables)
+            {
+                ScriptVariable v = new ScriptVariable();
+                v.Name = item.Identifier.ToString();
+
+                if (item.Initializer.Value.GetType() == typeof(ObjectCreationExpressionSyntax))
+                {
+                    v.Type = (item.Initializer.Value as ObjectCreationExpressionSyntax).Type.ToString();
+                }
+                else if (item.Initializer.Value.GetType() == typeof(InvocationExpressionSyntax))
+                {
+                    v.Type = (((item.Initializer.Value as InvocationExpressionSyntax).Expression as MemberAccessExpressionSyntax).Name as GenericNameSyntax).TypeArgumentList.Arguments[0].ToString();
+                }
+
+                vars.Add(v);
+            }
+
+            return vars;
+        }
+
+        private void FillVariables(List<VariableDeclaratorSyntax> variables, List<SyntaxNode> existingNodes, SyntaxNode node)
+        {
+            var nodes = node.ChildNodes().ToList();
+
+            nodes.RemoveAll(x => existingNodes.Contains(x));
+
+            foreach (var item in nodes)
+            {
+                existingNodes.Add(item);
+
+                if (item.GetType() == typeof(VariableDeclaratorSyntax))
+                {
+                    variables.Add(item as VariableDeclaratorSyntax);
+                }
+                else if (item == node)
+                {
+                    continue;
+                }
+                else
+                {
+                    FillVariables(variables, existingNodes, item);
+                }
+            }
+        }
+
+        private class ScriptVariable
+        {
+            public String Name { get; set; }
+            public String Type { get; set; }
+
+            public override string ToString()
+            {
+                return String.Format("{0} : {1}", Type, Name);
+            }
+        }
     }
 }
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptSymbol.cs b/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptSymbol.cs
index d6fdaeebf..4b34837af 100644
--- a/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptSymbol.cs
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting/Parsing/ScriptSymbol.cs
@@ -17,6 +17,10 @@ namespace Tango.Scripting.Parsing
         public String ContainingNamespace { get; set; }
         public List<KeyValuePair<String,String>> Parameters { get; set; }
         public String Summary { get; set; }
+        public int Offset { get; set; }
+        public int Length { get; set; }
+        public bool IsUnassigned { get; set; }
+        public ISymbol RealSymbol { get; set; }
 
         public ScriptSymbol()
         {