partial void DeleteStudent_Class(Student_Class instance);
partial void UpdateStudent_Class(Student_Class instance);
private void detach_Student_Class(Student_Class entity) { this.SendPropertyChanging(); entity.ClassInfo = null; }
partial void InsertStudent_Class(Student_Class instance);
private void attach_Student_Class(Student_Class entity) { this.SendPropertyChanging(); entity.Student = this; }