private void detach_ExpertCostArticles(ExpertCostArticle entity)
		{
			this.SendPropertyChanging();
			entity.Expert = null;
		}
		private void attach_ExpertCostArticles(ExpertCostArticle entity)
		{
			this.SendPropertyChanging();
			entity.CostArticle = this;
		}
 partial void UpdateExpertCostArticle(ExpertCostArticle instance);
 partial void DeleteExpertCostArticle(ExpertCostArticle instance);
 partial void InsertExpertCostArticle(ExpertCostArticle instance);