public int RefundT(int staffid, int customerid, double paymentAmount, string creditcardno, string expiry, string cvv) { //return string.Format("{0}:{1}:{2}:{3}:{4}:{5}",staffid, customerid, paymentAmount, creditcardno, expiry, cvv) ; int tID = -1; try { CreditCardServiceClient cc = new CreditCardServiceClient(); tID = cc.Credit(creditcardno, paymentAmount); return tID; } catch (Exception e) { } return tID; }