Fixed bug with name changes not saved to xaml source

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Xaml/XamlDesignItem.cs

@@ -48,9 +48,20 @@ public override Type ComponentType {
 			get { return _xamlObject.ElementType; }
 		}
 
+		void SetNameInternal(string newName)
+		{
+			_xamlObject.Name = newName;
+		}
+
 		public override string Name {
 			get { return _xamlObject.Name; }
-			set { _xamlObject.Name = value; }
+			set {
+				UndoService undoService = this.Services.GetService<UndoService>();
+				if (undoService != null)
+					undoService.Execute(new SetNameAction(this, value));
+				else
+					SetNameInternal(value);
+			}
 		}
 
 		public override string Key {
@@ -174,5 +185,52 @@ public override DesignItem Clone()
 		    }
 		    return item;
 		}
+
+		sealed class SetNameAction : ITransactionItem
+		{
+			XamlDesignItem designItem;
+			string oldName;
+			string newName;
+
+			public SetNameAction(XamlDesignItem designItem, string newName)
+			{
+				this.designItem = designItem;
+				this.newName = newName;
+
+				oldName = designItem.Name;
+			}
+
+			public string Title {
+				get {
+					return "Set name";
+				}
+			}
+
+			public void Do()
+			{
+				designItem.SetNameInternal(newName);
+			}
+
+			public void Undo()
+			{
+				designItem.SetNameInternal(oldName);
+			}
+
+			public System.Collections.Generic.ICollection<DesignItem> AffectedElements {
+				get {
+					return new DesignItem[] { designItem };
+				}
+			}
+
+			public bool MergeWith(ITransactionItem other)
+			{
+				SetNameAction o = other as SetNameAction;
+				if (o != null && designItem == o.designItem) {
+					newName = o.newName;
+					return true;
+				}
+				return false;
+			}
+		}
 	}
 }