private void detach_Ducks(Duck entity)
 {
     this.SendPropertyChanging();
     entity.Prize = null;
 }
 private void attach_Ducks(Duck entity)
 {
     this.SendPropertyChanging();
     entity.Prize = this;
 }
 partial void UpdateDuck(Duck instance);
 partial void DeleteDuck(Duck instance);
 partial void InsertDuck(Duck instance);