private void detach_Appointments(Appointment entity)
		{
			this.SendPropertyChanging();
			entity.Patient = null;
		}
		private void attach_Appointments(Appointment entity)
		{
			this.SendPropertyChanging();
			entity.Doctor = this;
		}
 partial void UpdateAppointment(Appointment instance);
 partial void DeleteAppointment(Appointment instance);
 partial void InsertAppointment(Appointment instance);