CommandCanExecuteChanged - событие

public event EventHandler CanExecuteChanged

Public Event CanExecuteChanged As EventHandler

public:
virtual  event EventHandler^ CanExecuteChanged {
	void add (EventHandler^ value);
	void remove (EventHandler^ value);
}

abstract CanExecuteChanged : IEvent<EventHandler,
    EventArgs>
override CanExecuteChanged : IEvent<EventHandler,
    EventArgs>