Raises the UploadProgressChanged event.
Assembly: System (in System.dll)
Classes that inherit from this class can override this method to perform additional tasks when the UploadProgressChanged event occurs.
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.Notes to Inheritors
When overriding in a derived class, be sure to call the base class’s method so that registered delegates receive the event.