test.cs

private Invoice CreateSampleInvoice() {
   // new zugferd invoice
   Invoice invoice = new Invoice("A12345", DateTime.Now, CurrencyCode.USD);

   invoice.Type = InvoiceType.Invoice;
   invoice.Profile = Profile.Comfort;

   // buyer
   invoice.Buyer = new TradeParty {
      ID = "TX_1",
      Name = "Text Control GmbH",
      ContactName = "Peter Paulsen",
      City = "Bremen",
      Postcode = "28217",
      Country = CountryCode.DE,
      Street = "Überseetor 18"
   };

   // seller
   invoice.Seller = new TradeParty {
      ID = "TX_2",
      Name = "Text Control, LLC",
      ContactName = "Jack Jackson",
      City = "Charlotte, NC",
      Postcode = "28210",
      Country = CountryCode.US,
      Street = "6926 Shannon Willow Rd, Suite 400",
   };

   // add tax id's
   invoice.Seller.SpecifiedTaxRegistrations.Add(
      new TaxID() { ID = "US12367623", Scheme = TaxScheme.VA });

   // add products
   List<LineItem> lineItems = new List<LineItem>();

   lineItems.Add(new LineItem() {
      Price = 200,
      ProductID = "A123",
      Name = "Product A",
      Quantity = 5,
      Total = 1000,
      UnitCode = QuantityCodes.C62
   });

   // add line items to invoice
   foreach (LineItem item in lineItems)
      invoice.LineItems.Add(item);

   // set the total amount
   invoice.TotalAmount = 1000;

   return invoice;
}