/// <summary>
 /// Removes a handler for the VisualizationEnter event.
 /// </summary>
 /// <param name="element"></param>
 /// <param name="handler"></param>
 public static void RemoveVisualizationEnterHandler(
     DependencyObject element,
     TagVisualizationEnterLeaveEventHandler handler)
 {
     RemoveHandler(element, VisualizationEnterEvent, handler);
 }
 /// <summary>
 /// Adds a handler for the VisualizationLeave event.
 /// </summary>
 /// <param name="element"></param>
 /// <param name="handler"></param>
 public static void AddVisualizationLeaveHandler(
     DependencyObject element,
     TagVisualizationEnterLeaveEventHandler handler)
 {
     AddHandler(element, VisualizationLeaveEvent, handler);
 }