title: WPF: ComboBox F4 key is not firing in KeyDown Event
body: <p>I need to stop F4's default functionality for ComboBox. While googling for it, I came across in various solutions with previewkeydown of combobox. But for my requirement i cant restrict the previewkeydown event. Any other way to handle this case?. If it is a bug in combobox, any other workaround to get the keydown event for F4 key.</p>