private int CreateLineItemFromSubscription(int customerId, int itemId) { var subscriptionsService = new SubscriptionsService(Config); var subscriptionId = subscriptionsService.CreateSubscription(new Subscription { CustomerId = customerId, HolduntilDatetime = DateTime.Parse("2013-10-01"), LineItems = new[] { new InvoiceLineItem { Descrip = "desc", ItemId = itemId } } }).Id; return(subscriptionsService.GetSpecificSubscription(subscriptionId).Response.LineItems[0].LineItemId); }