private void btn_order_Click(object sender, EventArgs e) { string bankName = cmbx_bank.Text, duration = cmbx_duratoin.Text, cardType = cmbx_type.Text; // validation CardManager cardManager = new CardManager(bankName, duration, cardType, Session.User); Card card = cardManager.GetCard(); using (DatabaseManager db = new DatabaseManager("myDB")) { db.AddCard(card); } txbx_cardNumber.Text = card.CardNumber; txbx_cvc.Text = card.CVC.ToString(); txbx_expDate.Text = card.ExpiredDate.ToString(); MessageBox.Show("Card is done!"); }