RoutedEventArgs Constructor (RoutedEvent, Object)
Initializes a new instance of the RoutedEventArgs class, using the supplied routed event identifier, and providing the opportunity to declare a different source for the event.
Assembly: PresentationCore (in PresentationCore.dll)
When using this overloaded constructor, unspecified properties of the new RoutedEventArgs instance assume the following default values:
Null values for OriginalSource are populated based on the element that raised the event and passed on through the routing, but will read null prior to invocation.