c# - Ctrl key press condition in WPF MouseLeftButtonDown event-handler -

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How I can add additional position of keyboard keys, say, Ctrl-key position WPF MouseLeftButtonDown event-handler? 

  private void Grid_MouseLeftButtonDown (object sender, MouseButtonEventArgs e) {...}  

  private void Grid_MouseLeftButtonDown (object sender, MouseButtonEventArgs e) {if (Keyboard.IsKeyDown (Key.LeftCtrl) || Keyboard.IsKeyDown (Key. RightCtrl)) {MessageBox.Show ( "control key down "); } Other {message box. Show ( "control key"); }}

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