private void detach_DetailTransactions(DetailTransaction entity)
 {
     this.SendPropertyChanging();
     entity.Product = null;
 }
 partial void DeleteDetailTransaction(DetailTransaction instance);
 partial void InsertDetailTransaction(DetailTransaction instance);
 partial void UpdateDetailTransaction(DetailTransaction instance);
 private void attach_DetailTransactions(DetailTransaction entity)
 {
     this.SendPropertyChanging();
     entity.HeaderTransaction = this;
 }