public: DependencyProperty SubHeaderProperty = DependencyProperty.Register( "SubHeader", typeof(string), typeof(RibbonMainMenuItem), new FrameworkPropertyMetadata( "", FrameworkPropertyMetadataOptions.AffectsRender));

public static readonly DependencyProperty SubHeaderProperty = DependencyProperty.Register( "SubHeader", typeof(string), typeof(RibbonMainMenuItem), new FrameworkPropertyMetadata( "", FrameworkPropertyMetadataOptions.AffectsRender));

Public static readonly SubHeaderProperty As DependencyProperty = DependencyProperty.Register( "SubHeader", typeof(string), typeof(RibbonMainMenuItem), new FrameworkPropertyMetadata( "", FrameworkPropertyMetadataOptions.AffectsRender))