partial void Deletetlb_nganh(tlb_nganh instance);
 partial void Inserttlb_nganh(tlb_nganh instance);
 partial void Updatetlb_nganh(tlb_nganh instance);
 private void detach_tlb_nganhs(tlb_nganh entity)
 {
     this.SendPropertyChanging();
     entity.tlb_bomon = null;
 }