Changing Event Handler Delegate
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public delegate void PropertyChangingEventHandler(System::Object ^ sender, PropertyChangingEventArgs ^ e);
public delegate void PropertyChangingEventHandler(object sender, PropertyChangingEventArgs e);
public delegate void PropertyChangingEventHandler(object? sender, PropertyChangingEventArgs e);
type PropertyChangingEventHandler = delegate of obj * PropertyChangingEventArgs -> unit
Public Delegate Sub PropertyChangingEventHandler(sender As Object, e As PropertyChangingEventArgs)
The source of the event.
When you create a PropertyChangingEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Handling and Raising Events.
Gets an object that represents the method represented by the specified delegate.