private void detach_PhanCongs(PhanCong entity)
 {
     this.SendPropertyChanging();
     entity.NhanVien = null;
 }
 private void attach_PhanCongs(PhanCong entity)
 {
     this.SendPropertyChanging();
     entity.NhanVien = this;
 }
 partial void UpdatePhanCong(PhanCong instance);
 partial void DeletePhanCong(PhanCong instance);
 partial void InsertPhanCong(PhanCong instance);