partial void DeleteProductReview(ProductReview instance);
 partial void UpdateProductReview(ProductReview instance);
		private void detach_ProductReviews(ProductReview entity)
		{
			this.SendPropertyChanging();
			entity.Product = null;
		}
 partial void InsertProductReview(ProductReview instance);
		private void attach_ProductReviews(ProductReview entity)
		{
			this.SendPropertyChanging();
			entity.Product = this;
		}