private void btn_order_Click(object sender, EventArgs e) { string bankName = cmbx_bankName.Text, duration = cmbx_duration.Text, cardType = cmbx_cardType.Text; //validation CardManager cardManager = new CardManager(bankName, duration, cardType, Session.User); Card card = cardManager.GetCard(); //Session.Data.Cards.Add(card); using (DatabaseManager db = new DatabaseManager("myDB")) { db.AddCards(card); } txbx_number.Text = card.CardNumber; txbx_cvc.Text = card.CVC.ToString(); txbx_expiredDate.Text = card.ExpiredDate.ToString(); MessageBox.Show("Card is done!"); }