private void detach_bookorders(bookorder entity)
{
this.SendPropertyChanging();
entity.Book = null;
}
private void attach_bookorders(bookorder entity)
{
this.SendPropertyChanging();
entity.Book = this;
}
partial void Updatebookorder(bookorder instance);
partial void Deletebookorder(bookorder instance);
partial void Insertbookorder(bookorder instance);