public void GoBack(IRemoteControl window)
 {
     if (window == null)
     {
         throw new ArgumentException("Window argument cannot be null");
     }
     if (window.Equals(CurrentWindow) && WindowStack.Count > 0)
     {
         window             = PopAvailableWindow();
         this.CurrentWindow = null;
         ShowWindow(window);
     }
 }
 public void GoBack(IRemoteControl window)
 {
     if (window == null) {
         throw new ArgumentException("Window argument cannot be null");
     }
     if (window.Equals(CurrentWindow) && WindowStack.Count > 0) {
         window = PopAvailableWindow();
         this.CurrentWindow = null;
         ShowWindow(window);
     }
 }