public string Deliver(String firstname, String surname, String email) //override?

        {

            //LoadCustomerDataFile();



            SoapClient client = new SoapClient();
            Console.WriteLine("Set up client.");
            client.ClientCredentials.UserName.UserName = UserName;

            client.ClientCredentials.UserName.Password = Password;

            UpdateOptions uo = new UpdateOptions();


            uo.SaveOptions = new SaveOption[1];

            uo.SaveOptions[0] = new SaveOption();

            uo.SaveOptions[0].SaveAction = SaveAction.UpdateAdd;//This set this call to act as an UpSert, meaning if the Subscriber doesn't exist it will Create if it does it will Update

            uo.SaveOptions[0].PropertyName = "*";



            DataExtensionObject deo2 = GetDataExtensionObject(firstname, surname, email);
            string result = "";
            string uRequestID2 = String.Empty;
            string uStatus2 = String.Empty;
            UpdateResult[] uResults2 = client.Update(uo, new APIObject[] { deo2 }, out uRequestID2, out uStatus2);
            Console.WriteLine("Updated!");

            result = result + "uRequestID is: " + uRequestID2 + "and uStatus is: " + uStatus2 + ". ";


            //Loop through each object returned and display the StatusMessage

            foreach (UpdateResult cr in uResults2)


            {
                result = result + " Result is: " + cr.StatusMessage;

            }


            return result;

        }