protected void RemoveWithoutUnloading(GameScreen Screen)
 {
     ListGameScreen.Remove(Screen);
 }
 public void RemoveScreen(GameScreen Screen)
 {
     Screen.Alive = false;
 }
 public void PushScreen(GameScreen Screen)
 {
     Screen.ListGameScreen = ListGameScreen;
     Screen.Load();
     ListGameScreen.Insert(0, Screen);
 }