public void saveOrderStatusEnquiryAsync(int orderID, int userID) { saveOrderStatusEnquiry orderStatusEnquiryDelegate = new saveOrderStatusEnquiry(GetOrderStatusEnquiry); AsyncCallback enquiryCompletedCallback = new AsyncCallback(enquiryTaskCompletedCallback); lock (_sync) { orderStatusEnquiryDelegate.BeginInvoke(orderID, userID, enquiryCompletedCallback, null); _taskIsRunning = true; } }