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File2

color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;
using System.Windows.Threading;

namespace Tango.Core
{
    public class SynchronizedObservableCollection<T> : ObservableCollection<T>
    {
        private object _sync_lock = new object();
        private object _modify_lock = new object();
        private SynchronizedObservableCollectionDispatcher _dispatcher;

        public SynchronizedObservableCollection() : base()
        {
            _dispatcher = new SynchronizedObservableCollectionDispatcher();
            BindingOperations.EnableCollectionSynchronization(this, _modify_lock);
        }

        public SynchronizedObservableCollection(IEnumerable<T> collection) : base(collection)
        {
            _dispatcher = new SynchronizedObservableCollectionDispatcher();
            BindingOperations.EnableCollectionSynchronization(this, _modify_lock);
        }

        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
        {
            lock (_modify_lock)
            {
                _dispatcher.Invoke(() =>
                {
                    base.OnCollectionChanged(e);
                });
            }
        }

        protected override void InsertItem(int index, T item)
        {
            lock (_modify_lock)
            {
                base.InsertItem(index, item);
            }
        }

        protected override void RemoveItem(int index)
        {
            lock (_modify_lock)
            {
                base.RemoveItem(index);
            }
        }

        protected override void ClearItems()
        {
            lock (_modify_lock)
            {
                base.ClearItems();
            }
        }
    }

    internal class SynchronizedObservableCollectionDispatcher
    {
        internal Dispatcher Dispatcher { get; set; }

        internal SynchronizedObservableCollectionDispatcher()
        {
            if (Application.Current != null)
            {
                Dispatcher = Application.Current.Dispatcher;
            }
        }

        internal void Invoke(Action action)
        {
            if (Dispatcher != null)
            {
                Dispatcher.Invoke(action);
            }
            else
            {
                action();
            }
        }
    }
}