How to get the invoice item list / item cost list

@operator

Hey,

I'm trying to access the invoice item list from an invoice and the list is null,
how can i get that list?

Thanks

             SearchDateField tDateSearch = new SearchDateField();              tDateSearch.searchValue = DateTime.Now.AddDays(-1);              tDateSearch.searchValueSpecified = true;              tDateSearch.@operator = SearchDateFieldOperator.after;              tDateSearch.operatorSpecified = true;              tranSearch.basic.dateCreated = tDateSearch;                SearchEnumMultiSelectField semsfInvoiceFilter = new SearchEnumMultiSelectField();              semsfInvoiceFilter.@operator = SearchEnumMultiSelectFieldOperator.anyOf;              semsfInvoiceFilter.operatorSpecified = true;              string[] mySearchTransTypes = { "_invoice" };               semsfInvoiceFilter.searchValue = mySearchTransTypes;              tranSearch.basic.type = semsfInvoiceFilter;                SearchResult result = ns.Service.search(tranSearch);                foreach (Invoice item in result.recordList)              {                  InvoiceItemCostList list = item.itemCostList; // this is null                  foreach (var invoiceItem in list.itemCost)                  {                      Console.WriteLine(invoiceItem.amount.ToString() + " " + invoiceItem.cost.ToString() + " " + invoiceItem.itemDisp + " " + invoiceItem.unitDisp);                  }              }