private void detach_ProductImages(ProductImage entity)
		{
			this.SendPropertyChanging();
			entity.Product = null;
		}
		private void attach_ProductImages(ProductImage entity)
		{
			this.SendPropertyChanging();
			entity.Product = this;
		}
 partial void UpdateProductImage(ProductImage instance);
 partial void DeleteProductImage(ProductImage instance);
 partial void InsertProductImage(ProductImage instance);