private void detach_Tenders(Tender entity)
 {
     this.SendPropertyChanging();
     entity.Org = null;
 }
 private void attach_Tenders(Tender entity)
 {
     this.SendPropertyChanging();
     entity.Org = this;
 }
 partial void UpdateTender(Tender instance);
 partial void DeleteTender(Tender instance);
 partial void InsertTender(Tender instance);