"Base types" node now only shown in ClassBrowser, if there are indeed any base types.

src/Main/Base/Project/Dom/ClassBrowser/BaseTypesTreeNode.cs

@@ -2,6 +2,7 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Linq;
 using ICSharpCode.NRefactory.TypeSystem;
 
 namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
@@ -23,6 +24,7 @@ namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
 			this.definition.Updated += (sender, e) => UpdateBaseTypes();
 			this.text = SD.ResourceService.GetString("MainWindow.Windows.ClassBrowser.BaseTypes");
 			baseTypes = new SimpleModelCollection<ITypeDefinitionModel>();
+			UpdateBaseTypes();
 		}
 
 		protected override IModelCollection<object> ModelChildren {
@@ -31,10 +33,9 @@ namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
 			}
 		}
 		
-		protected override void LoadChildren()
+		public bool HasBaseTypes()
 		{
-			UpdateBaseTypes();
-			base.LoadChildren();
+			return baseTypes.Count > 0;
 		}
 		
 		void UpdateBaseTypes()

src/Main/Base/Project/Dom/ClassBrowser/TypeDefinitionTreeNode.cs

@@ -22,6 +22,7 @@ namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
 			if (definition == null)
 				throw new ArgumentNullException("definition");
 			this.definition = definition;
+			this.definition.Updated += (sender, e) => UpdateBaseTypesNode();
 		}
 		
 		protected override object GetModel()
@@ -57,7 +58,14 @@ namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
 		protected override void LoadChildren()
 		{
 			base.LoadChildren();
+			UpdateBaseTypesNode();
+		}
+		
+		void UpdateBaseTypesNode()
+		{
+			this.Children.RemoveAll(n => n is BaseTypesTreeNode);
 			var baseTypesTreeNode = new BaseTypesTreeNode(definition);
+			if (baseTypesTreeNode.HasBaseTypes())
 				Children.Insert(0, baseTypesTreeNode);
 		}