Why IsMouseOver is recognized and MouseDown isn't (Wpf Style trigger)?

Question

Why IsMouseOver is recognized as a WPF style trigger and MouseDown isn\'t -given that both are valid UIElement properties as seen here-. First trigger works well but second

Answer 1

You can use MouseDown Event in Style.Triggers but you have to use an EventTrigger for that.

    
        
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And remember that

the action will not be undone once the condition that raised the event is no longer true.