IPP .NET DevKit v2 - QBD Invoice - Add

//Add QBD Invoice
//Documentation: http://goo.gl/GiCLK

PhysicalAddress physicalAddress = new PhysicalAddress();
physicalAddress.Line1 = "123 Main St.";
physicalAddress.Line2 = "Apt. 12";
physicalAddress.City = "Mountain View";
physicalAddress.CountrySubDivisionCode = "CA";
physicalAddress.Country = "USA";
physicalAddress.PostalCode = "94043";
physicalAddress.Tag = new string[] { "Billing" };

InvoiceHeader invoiceHeader = new InvoiceHeader();
invoiceHeader.ARAccountId = new IdType() { idDomain = idDomainEnum.QB, Value = "37" };
invoiceHeader.ARAccountName = "Accounts Receivable";
invoiceHeader.CustomerId = new IdType() { idDomain = idDomainEnum.NG, Value = "3291253" };
invoiceHeader.Balance = (decimal)100.00;
invoiceHeader.BillAddr = physicalAddress;
invoiceHeader.BillEmail = "boston@celtics.com";
invoiceHeader.CustomerName = "Boston Celtics";
invoiceHeader.DocNumber = "1234567";
invoiceHeader.DueDate = DateTime.Now;
invoiceHeader.ShipAddr = physicalAddress;
invoiceHeader.ShipDate = DateTime.Now;
invoiceHeader.TaxAmt = (decimal)5;
invoiceHeader.TaxRate = (decimal).05;
invoiceHeader.ToBeEmailed = false;
invoiceHeader.TotalAmt = (decimal)105.00;

List<InvoiceLine> listLine = new List<InvoiceLine>();

//Loop for multiple invoice lines could be added here
ItemsChoiceType2[] invoiceItemAttributes = { ItemsChoiceType2.ItemId, ItemsChoiceType2.UnitPrice,ItemsChoiceType2.Qty  };
object[] invoiceItemValues = { new IdType() { idDomain = idDomainEnum.QB, Value = "5" }, new decimal(33), new decimal(2) };
var invoiceLine = new InvoiceLine();
invoiceLine.Amount = 66;
invoiceLine.AmountSpecified = true;
invoiceLine.Desc = "test " + DateTime.Now.ToShortDateString();
invoiceLine.ItemsElementName = invoiceItemAttributes;
invoiceLine.Items = invoiceItemValues;
invoiceLine.ServiceDate = DateTime.Now;
invoiceLine.ServiceDateSpecified = true;
listLine.Add(invoiceLine);

Invoice invoice = new Invoice();
invoice.Header = invoiceHeader;
invoice.Line = listLine.ToArray();

Invoice addedInvoice = commonService.Add(invoice);