private void AddLeaveTypeExecute() { try { _leaveService.AddLeaveType(NewLeaveTypeName); NewLeaveTypeName = string.Empty; CustomMessageBox.CustomMessageBox.Show("Poprawnie dodano nowy rodzaj zwolnienia."); } catch (LeaveTypeException exc) { CustomMessageBox.CustomMessageBox.Show(exc.Message, "Błąd"); } RetrieveLeaveTypes(); }