title: WPF: Is there an event that is fired when the user presses the close button [X]?
body: <p>Is there an event that is fired when the user presses the close button?</p>
  
  <p>This is because the Window <code>Closing</code> event is fired both when one closes the window manually (with the <code>Close</code> method) and also when the user presses the [X] button...but I somehow need to know only when the user presses the [X] button not when the window is closed manually.</p>