//Returns true if the user can access the selected invoice public static bool UserCanAccessInvoice(int _UserID, int _InvoiceID) { UsersDataContext dc = new UsersDataContext(); var result = dc.S1_Users_Security_CanAccessInvoice(_UserID, _InvoiceID); if (result != null && result.Count() > 0) { return(true); } else { return(false); } }