IPP .NET DevKit v2 - QBD InvoiceQuery - ContactIdSet

//Retrieve QBD Invoices by Customer ID
//Documentation: http://goo.gl/daiyz

InvoiceQuery invoiceQuery = new InvoiceQuery();
IdType[] customerIdType = new IdType[] { new IdType() { idDomain = idDomainEnum.QB, Value = "792" } };
invoiceQuery.Item1 = new IdSet() { Id = customerIdType };
invoiceQuery.Item1ElementName = Item1ChoiceType4.ContactIdSet;
List<Intuit.Ipp.Data.Qbd.Invoice> invoicesByCustomer = invoiceQuery.ExecuteQuery<Intuit.Ipp.Data.Qbd.Invoice>(context).ToList();