partial void DeleteSmallArea(SmallArea instance);
partial void UpdateSmallArea(SmallArea instance);
private void detach_SmallArea(SmallArea entity) { this.SendPropertyChanging(); entity.CityZone = null; }
partial void InsertSmallArea(SmallArea instance);
private void attach_SmallArea(SmallArea entity) { this.SendPropertyChanging(); entity.CityZone = this; }