如何在mvc上使用cascade删除？

Question

如何在mvc上使用级联引用删除，以便删除两个表？

public ActionResult Delete(int appointmentid)
{
    Appointment appointment = _database.Appointment.Find(appointmentid);
    if (appointment == null)
    {
        return HttpNotFound();
    }
    return View();
}

[HttpPost, ActionName("Delete")]
public ActionResult DeleteConfirmed(int appointmentid)
{
    Appointment appointment = _database.Appointment.Find(appointmentid);
    if (appointment == null)
    {
        return HttpNotFound();
    }
    _database.Appointment.Remove(appointmentid);
    _database.Appointment.SaveChanges();
    return RedirectToAction("Create");
}

这不起作用