partial void DeleteArticle(Article instance);
 partial void UpdateArticle(Article instance);
		private void detach_Articles(Article entity)
		{
			this.SendPropertyChanging();
			entity.Staff = null;
		}
 partial void InsertArticle(Article instance);
		private void attach_Articles(Article entity)
		{
			this.SendPropertyChanging();
			entity.Staff = this;
		}