private void DeleteHoliday() { string sMessageBoxText = "Do you want to delete this holiday?"; string sCaption = "Are you Sure?"; MessageBoxButton btnMessageBox = MessageBoxButton.YesNo; MessageBoxImage icnMessageBox = MessageBoxImage.Warning; MessageBoxResult rsltMessageBox = System.Windows.MessageBox.Show(sMessageBoxText, sCaption, btnMessageBox, icnMessageBox); switch (rsltMessageBox) { case MessageBoxResult.Yes: HolidayManager hm = new HolidayManager(); HolidayCollection hc = new HolidayCollection(); hm.DeleteHoliday(selectedHolidayId); hc.RetreiveAllHolidays(); MessageBox.Show("Holiday successfully deleted."); Close(); break; case MessageBoxResult.No: break; } }