Octgn.Play.PlayWindow.OnClosing C# (CSharp) Method

        protected override void OnClosing(CancelEventArgs e)
        {
            if (TopMostMessageBox.Show(
                "Are you sure you want to quit the game?",
                "Octgn",
                MessageBoxButton.YesNo,
                MessageBoxImage.Question) != MessageBoxResult.Yes)
                e.Cancel = true;
            if (e.Cancel == false)
            {
                IsRealClosing = true;
            }
            base.OnClosing(e);
        }