public string InsertOrUpdateTimesheets(List <Timesheet> timesheetList) { StringBuilder sb = new StringBuilder(); if (timesheetList != null && timesheetList.Count > 0) { try { for (int i = 0; i < timesheetList.Count; i++) { _repository.InsertOrUpdate(timesheetList[i]); } } catch (Exception ex) { sb.Append(ex.Message); } } return(sb.ToString()); }