private void detach_StudentPredmets(StudentPredmet entity)
 {
     this.SendPropertyChanging();
     entity.Student = null;
 }
 private void attach_StudentPredmets(StudentPredmet entity)
 {
     this.SendPropertyChanging();
     entity.Student = this;
 }
 partial void UpdateStudentPredmet(StudentPredmet instance);
 partial void DeleteStudentPredmet(StudentPredmet instance);
 partial void InsertStudentPredmet(StudentPredmet instance);