partial void DeleteCertificateHistory(CertificateHistory instance);
 partial void InsertCertificateHistory(CertificateHistory instance);
 partial void UpdateCertificateHistory(CertificateHistory instance);
		private void detach_CertificateHistories(CertificateHistory entity)
		{
			this.SendPropertyChanging();
			entity.DbidsCertificate = null;
		}