Gets the identifier for the dependency property where the value change occurred.
Assembly: WindowsBase (in WindowsBase.dll)
This property is relevant if used within a common PropertyChangedCallback that is registered for several properties, and it is necessary to disambiguate which property change invoked the callback. is not typically relevant for raising events, because there is usually a 1:1 correspondence between properties and events that report the property change. The event that was raised is itself the indication of which property changed.