partial void DeleteBookGenre(BookGenre instance);
 partial void UpdateBookGenre(BookGenre instance);
		private void detach_BookGenres(BookGenre entity)
		{
			this.SendPropertyChanging();
			entity.Genre = null;
		}
 partial void InsertBookGenre(BookGenre instance);
		private void attach_BookGenres(BookGenre entity)
		{
			this.SendPropertyChanging();
			entity.Genre = this;
		}