public Invoice issueInvoice(int receiverEntityID, int currencyID, Dictionary<deliverable, decimal> servicesAmt)
{
var invoiceData=new invoice{};
var inv = new Invoice();
inv.New(invoiceData);
foreach (var item in servicesAmt)
inv.addInvoiceOrderDetail((item.Key as deliverable));
inv.finalizeInvoice();
return inv;
}
