RoutedEventArgs.OnSetSource Method (Object)
When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.
Assembly: PresentationCore (in PresentationCore.dll)
Notes to Inheritors:
Changing the reported source of an event programmatically can potentially require updating the type-specific data within the event. For this reason, the RoutedEventArgs.method is protected virtual and is intended to be overridden by subclasses of
This method has no default implementation.
Available since 3.0