MessageBox Dialog / Confirm Dialog บน Windows Store Apps (C#)

using Windows.UI.Popups;

MessageDialog msgDialog = new MessageDialog("Your message", "Your title");
msgDialog.ShowAsync();

        private void Button_Click(object sender, RoutedEventArgs e)
        {
           MessageBox("Your Message");
        }

        protected async void MessageBox(string msg)
        {
            // using Windows.UI.Popups;
            var msgDlg = new MessageDialog(msg);
            msgDlg.DefaultCommandIndex = 1;
            await msgDlg.ShowAsync();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
			MessageDialog msgDialog = new MessageDialog("Your message", "Your title");
			msgDialog.ShowAsync();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            MessageDialog msgDialog = new MessageDialog("Your message", "Your title");

            //OK Button
            UICommand okBtn = new UICommand("OK");
            okBtn.Invoked = OkBtnClick;
            msgDialog.Commands.Add(okBtn);

            //Cancel Button
            UICommand cancelBtn = new UICommand("Cancel");
            cancelBtn.Invoked = CancelBtnClick;
            msgDialog.Commands.Add(cancelBtn);

            //Show message
            msgDialog.ShowAsync();
        }

        private void CancelBtnClick(IUICommand command)
        {
        }

        private void OkBtnClick(IUICommand command)
        {
        }