private void detach_Doctors(Doctor entity)
		{
			this.SendPropertyChanging();
			entity.Specialization = null;
		}
		partial void DeleteDoctors(Doctor instance);
		partial void InsertDoctors(Doctor instance);
		partial void UpdateDoctors(Doctor instance);
 public void AddDoctor(Doctor doctor)
 {
     context.Doctors.InsertOnSubmit(doctor);
     context.SubmitChanges();
 }