Attached Behavior on ButtonBase to do something before the Click event is fired for others?

Is there any way I can wire up an attached behavior based on the ButtonBase class where I could do something before an开发者_如何学Goy other subscribers to the Click event are notified?

From my current understanding of events and RoutedEvents I would say no but maybe I'm missing something.

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You can use RegisterClassHandler to add a handler that will be called before all other instance handlers. I realize this is not an "attached behavior".