December 03, 2013
Called before the KeyUp event occurs.
Assembly: System.Windows (in System.Windows.dll)
The method is called before any event handler for the KeyUp event is called. This method allows derived classes to handle the KeyUp event without attaching a delegate. This is the preferred technique for handling the event in a derived class.Notes to Inheritors
If you override , you can prevent registered delegates from receiving events by setting Handled to true. For more information about routed events and Handled the property, see Events for Windows Phone.