Debugger support for ReactiveCollection

ReactiveUI/CollectionDebugView.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace ReactiveUI
+{
+    internal sealed class CollectionDebugView<T>
+    {
+        private readonly ICollection<T> collection;
+
+        public CollectionDebugView(ICollection<T> collection)
+        {
+            if (collection == null)
+                throw new ArgumentNullException("collection", "collection is null.");
+            this.collection = collection;
+        }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
+        public T[] Items
+        {
+            get
+            {
+                T[] array = new T[this.collection.Count];
+                this.collection.CopyTo(array, 0);
+                return array;
+            }
+        }
+    }
+}

ReactiveUI/ReactiveCollection.cs

@@ -15,9 +15,12 @@
 using System.Threading;
 using System.Reactive.Disposables;
 using System.Globalization;
+using System.Diagnostics;
 
 namespace ReactiveUI
 {
+    [DebuggerDisplay("Count = {Count}")]
+    [DebuggerTypeProxy(typeof(CollectionDebugView<>))]
     public class ReactiveCollection<T> : IList<T>, IList, IReactiveCollection<T>, INotifyPropertyChanging, INotifyPropertyChanged, IEnableLogger
     {
         public event NotifyCollectionChangedEventHandler CollectionChanging;

ReactiveUI/ReactiveUI.csproj

@@ -144,6 +144,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="PropertyBinding.cs" />
     <Compile Include="ReactiveCollection.cs" />
+    <Compile Include="CollectionDebugView.cs" />
     <Compile Include="ReactiveCollectionMixins.cs" />
     <Compile Include="ReactiveNotifyPropertyChangedMixin.cs" />
     <Compile Include="ReactiveObject.cs" />