partial void DeleteContent(Content instance);
 partial void UpdateContent(Content instance);
		private void detach_Contents(Content entity)
		{
			this.SendPropertyChanging();
			entity.ContentType = null;
		}
 partial void InsertContent(Content instance);
		private void attach_Contents(Content entity)
		{
			this.SendPropertyChanging();
			entity.ContentType = this;
		}