What's the use / purpose of the RadPane Scenario when creating a new RadPane? A new xaml definition page is generated with <telerik:RadPane> as the closing / ending tag, and the designer will show the Header value, but you create content all day long but the content will never appear in the designer. The only way content is display is to run the application. Why does the designer not show the content as the xaml is being entered in the editor?