private void detach_ChiTiets(ChiTiet entity)
 {
     this.SendPropertyChanging();
     entity.BanTin = null;
 }
 private void attach_ChiTiets(ChiTiet entity)
 {
     this.SendPropertyChanging();
     entity.BanTin = this;
 }
 partial void UpdateChiTiet(ChiTiet instance);
 partial void DeleteChiTiet(ChiTiet instance);
 partial void InsertChiTiet(ChiTiet instance);