private void Bcargar_Click(object sender, RoutedEventArgs e)
 {
     if (TBox.Visibility == Visibility.Hidden)
     {
         lable.Visibility = Visibility.Visible;
         TBox.Visibility  = Visibility.Visible;
     }
     else
     {
         Partida p = new Partida(LoadGame(TBox.Text));
         p.Show();
         Close();
     }
 }