Each Diagram has an instance of this class as its Diagram.CommandHandler property. If you want to customize the standard behavior, you can easily override any of its methods and substitute an instance of your custom command handler class for your diagram.

            public class CustomCommandHandler : CommandHandler {
              protected override void CopyToClipboard(IDataCollection coll) {
                base.CopyToClipboard(coll);
                ... maybe set some other Clipboard data formats ...
              }
            }
            

              <go:Diagram ...>
                <go:Diagram.CommandHandler>
                  <local:CustomCommandHandler />
                </go:Diagram.CommandHandler>
              </go:Diagram>
            

              myDiagram.CommandHandler = new CustomCommandHandler();
            

Although this class inherits from FrameworkElement in order to support data binding, it is not really a FrameworkElement or UIElement! Please ignore all of the properties, methods, and events defined by FrameworkElement and UIElement.

System.Object
   System.Windows.DependencyObject
      System.Windows.UIElement
         System.Windows.FrameworkElement
            Northwoods.GoXam.CommandHandler

Reference