public static void DeleteYear(int year) { TrimesterCommentModel.DeleteAll(year); TrimesterSubjectCommentModel.DeleteAll(year); SemiTrimesterCommentModel.DeleteAll(year); PeriodCommentModel.DeleteAll(year); MarkModel.DeleteAll(year); TeacherClassModel.DeleteAll(year); LevelSubjectModel.DeleteAll(year); SubjectTeacherModel.DeleteAll(year); SemiTrimesterModel.DeleteAll(year); PeriodModel.DeleteAll(year); StudentModel.DeleteAll(year); ClassModel.DeleteAll(year); LevelModel.DeleteAll(year); SubjectModel.DeleteAll(year); TeacherModel.DeleteAll(year); YearParametersModel.DeleteAll(year); YearModel.Delete(year); MessageBox.Show("Suppresion de l'année réussie.", "Réussite", MessageBoxButton.OK, MessageBoxImage.Information); MainViewModel.Instance.LoadYears(); MainViewModel.Instance.SelectedYear = year - 1; }