private void ConfirmButton_Click(object sender, RoutedEventArgs e)
        {
            var pinblock = new PinBlock();

            byte[] pinBlockbytes = pinblock.CalculatePINBlock(TransactionInfo.Pan, 16, PasswordBox.Password, 4);

            string resultPibblock = pinblock.EncryptDESIpg(pinBlockbytes);

            TransactionInfo.Pinblock = resultPibblock;

            TransactionInfo.GoToPage(Pages.SelectOperationPage);
        }