public BillTrackings GetInvoiceData(QueryArgument queryArgument) { BillTrackings billTrackings; try { TransactionReadHelper.QueryArgument = queryArgument; billTrackings = TransactionReadHelper.GetInvoiceData(); } catch (Exception ex) { EventLogger.LogEvent(SysEventType.ERROR.ToString(), "Error", "GetInvoiceData Data failed with exception", ex); throw; } return(billTrackings); }