public PaymentInfo RemovePaymentInfo(PaymentInfo paymentInfo)
 {
     throw new Exception("Not implemented");
 }
 public PaymentInfo RemovePaymentInfo(PaymentInfo paymentInfo)
 {
     throw new Exception("Not implemented");
 }
 public void AddPaymentInfo(PaymentInfo paymentInfo)
 {
     throw new Exception("Not implemented");
 }
 public void AddPaymentInfo(PaymentInfo paymentInfo)
 {
     throw new Exception("Not implemented");
 }