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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Collections.ObjectModel;
namespace ICSharpCode.AvalonEdit.Utils
{
/// <summary>
/// A collection where adding and removing items causes a callback.
/// It is valid for the onAdd callback to throw an exception - this will prevent the new item from
/// being added to the collection.
/// </summary>
sealed class ObserveAddRemoveCollection<T> : Collection<T>
{
readonly Action<T> onAdd, onRemove;
public ObserveAddRemoveCollection
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