Overridden. Invoked when an unhandled System.Windows.Input.Keyboard.KeyDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
Overridden. Invoked when an unhandled System.Windows.Input.Keyboard.KeyUp attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.