private void MainButton_ButtonClick(object sender, EventArgs e)
        {
            MainButton btn = sender as MainButton;

            if (btn.ContentText == "Yes")
            {
                DialogResult = CxDialogResultEnum.Yes;
            }
            if (btn.ContentText == "No")
            {
                DialogResult = CxDialogResultEnum.No;
            }

            MessageBox.Show(DialogResult.ToString());
            this.Close();
        }
 private void ExitButton_Click(object sender, RoutedEventArgs e)
 {
     DialogResult = CxDialogResultEnum.Cancel;
     MessageBox.Show(DialogResult.ToString());
     this.Close();
 }