private void ConfirmButton_Click(object sender, RoutedEventArgs e)
        {
            if (MobileBox.Text.Length == 11 && TryCheckMobileNOBoxValidation(MobileBox.Text))
            {
                TransactionInfo.TopupRequest.Mobile = MobileBox.Text;

                TransactionInfo.GoToPage(Pages.ConfirmPaymentPage);
            }
            else
            {
                LabelMessage.Content = "شماره موبایل وارد شده صحیح نمی باشد";
                MobileBox.Focus();
            }
        }
 private void UserControl_Loaded(object sender, RoutedEventArgs e)
 {
     MobileBox.Focus();
 }