Question

I’m not really sure how to do this, as I’ve never had a need for this pattern just yet. I’m looking for the correct pattern on creating an event handler in a separate class that can remove itself when the object that contains the event executes.

Basically, I want to create an EventHandler that occurs on the WPF Window.Close event. And, during the execution of the handler it removes itself from the Window.Close event. I hope that’s specific enough to go on.

Also, is there a specific name for this pattern?

Answer 1

Try to do something like next:

 RoutedEventHandler handlerLoad = null;
 handlerLoad = delegate
        {
            //Do something
            Window.Close -= handlerLoad;
        };

Window.Close += handlerLoad;