private void UserControl_Loaded(object sender, RoutedEventArgs e) { if (FormMode == FormModes.Edit || FormMode == FormModes.View) { ClassDetail = ClassRepo.FindByID(_classid); SelectedSubjectList = ClassSubjectRepo.GetSelectedSubjects(_classid); UnSelectedSubjectList = ClassSubjectRepo.GetUnSelectedSubjects(_classid); } if (FormMode == FormModes.New) { UnSelectedSubjectList = SubjectRepo.GetAll(); } }