/// <summary>
 /// Method to enter the full screen mode.
 /// Really simple, if the user clicks on the image, the full screen
 /// window closes and the main window shows up.
 ///
 /// Could be improved passing current zoom.
 /// </summary>
 /// <param name="sender">Icon/Inage/Button</param>
 /// <param name="e">Mouse Event Args</param>
 private void OnMouseDownFullScreen(object sender, MouseButtonEventArgs e)
 {
     if (isMedia)
     {
         mediaPlayer.Stop();
         var fsw = new FullScreen(file);
         fsw.Show();
     }
     else
     {
         var fsw = new FullScreenImage(file);
         fsw.Show();
     }
 }