Generalize the work with the tree-nodes context menu.

ILSpy/TreeNodes/AssemblyTreeNode.cs

@@ -46,9 +46,6 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		readonly List<TypeTreeNode> classes = new List<TypeTreeNode>();
 		readonly Dictionary<string, NamespaceTreeNode> namespaces = new Dictionary<string, NamespaceTreeNode>();
 		
-		// UI
-		ContextMenu menu;
-		
 		public AssemblyTreeNode(string fileName, AssemblyList assemblyList)
 		{
 			if (fileName == null)
@@ -63,7 +60,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			
 			this.LazyLoading = true;
 			
-			CreateRemoveItemContextMenu();
+			CreateContextMenu();
 		}
 		
 		public string FileName {
@@ -129,10 +126,12 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			}
 		}
 		
-		void CreateRemoveItemContextMenu()
+		protected override void CreateContextMenu()
 		{
-			var menu = GetContextMenu();
-			
+			// this is necesary since it create the instance of the context menu
+			base.CreateContextMenu();
+		
+			// add specific items - remove assembly
 			MenuItem item = new MenuItem() {
 				Header = "Remove assembly",
 				Icon = new Image() { Source = Images.Delete }
@@ -140,7 +139,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			
 			item.Click += delegate { Delete(); };
 			
-			menu.Items.Add(item);
+			contextMenu.Items.Add(item);
 		}
 		
 		sealed class MyAssemblyResolver : IAssemblyResolver
@@ -177,14 +176,6 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			}
 		}
 		
-		public override ContextMenu GetContextMenu()
-		{
-			if (menu != null)
-				return menu;
-			
-			return (menu = new ContextMenu());
-		}
-		
 		protected override void LoadChildren()
 		{
 			try {

ILSpy/TreeNodes/ILSpyTreeNode.cs

@@ -20,6 +20,8 @@ using System;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.ComponentModel;
+using System.Windows;
+using System.Windows.Controls;
 
 using ICSharpCode.Decompiler;
 using ICSharpCode.TreeView;
@@ -31,6 +33,9 @@ namespace ICSharpCode.ILSpy.TreeNodes
 	/// </summary>
 	abstract class ILSpyTreeNodeBase : SharpTreeNode
 	{
+		// UI
+		protected ContextMenu contextMenu;
+		
 		FilterSettings filterSettings;
 		
 		public FilterSettings FilterSettings {
@@ -61,6 +66,18 @@ namespace ICSharpCode.ILSpy.TreeNodes
 				return FilterResult.Hidden;
 		}
 		
+		protected virtual void CreateContextMenu()
+		{
+			contextMenu = new ContextMenu();
+			
+			// add common context menu items, e.g. copy.
+		}
+		
+		public override ContextMenu GetContextMenu()
+		{
+			return contextMenu;
+		}
+		
 		protected object HighlightSearchMatch(string text, string suffix = null)
 		{
 			// TODO: implement highlighting the search match