Zuora.Services.PaymentManager.ApplyPaymentToMultipleInvoices C# (CSharp) Method

        public ResponseHolder ApplyPaymentToMultipleInvoices(String accountId, String[] invoiceIds, String paymentMethodId, Decimal amount, String type)
        {
            //create payment in draft
            Payment payment = new Payment();
            payment.Amount = amount;
            payment.AmountSpecified = true;
            payment.EffectiveDate = DateTime.Now;
            payment.EffectiveDateSpecified = true;
            payment.AccountId = accountId;
            payment.PaymentMethodId = paymentMethodId;
            payment.Type = type;
            payment.Status = "Draft";

            List<ResponseHolder> payCreateRes =  zs.Create(new List<zObject> { payment }, false);
            foreach (ResponseHolder rh in payCreateRes)
            {
                if (!rh.Success)
                {
                    return rh;
                }
            }
            List<zObject> ipList = new List<zObject>();
            //create invoice payment objects for the invoice amount
            foreach(String invId in invoiceIds)
            {
                ResponseHolder qRes = zs.Query("SELECT id, Amount FROM Invoice WHERE id = '" + invId + "'");
                Invoice inv = (Invoice)qRes.Objects[0];
                InvoicePayment ip = new InvoicePayment();
                ip.AmountSpecified = true;
                ip.Amount = inv.Amount;
                ip.InvoiceId = inv.Id;
                ip.PaymentId = payCreateRes[0].Id;

                ipList.Add(ip);
            }
            List<ResponseHolder> ipCreateRes = zs.Create(ipList, false);
            foreach (ResponseHolder rh in ipCreateRes)
            {
                if (!rh.Success)
                {
                    return rh;
                }
            }
            //update the original payment to be Proccessed
            Payment updatePayment = new Payment();
            updatePayment.Id = payCreateRes[0].Id;
            updatePayment.Status = "Processed";
            List<ResponseHolder> updateRes = zs.Update(new List<zObject>{ updatePayment });

            return updateRes[0];
        }