private void mainbutton_Click(object sender, RoutedEventArgs e)
        {
            GoBackWindow action = new GoBackWindow();

            action.ShowDialog();
            if (action.getYesNoFlag() == 1)
            {
                this.Close();
            }
        }
        private void restartbutton_Click(object sender, RoutedEventArgs e)
        {
            GoBackWindow action = new GoBackWindow();

            action.ShowDialog();
            if (action.getYesNoFlag() == 1)
            {
                vm.RestartGame();
            }
        }