Breaking 05_03 in twain

Ch05/05_03_End/Website/Extensions/UrlHelperExtensions.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using HPlusSports.Models;
+
+namespace HPlusSports
+{
+    public static class UrlHelperExtensions
+    {
+        public static string Product(this System.Web.Mvc.UrlHelper urlHelper, Product product)
+        {
+            return Product(urlHelper, product?.SKU);
+        }
+
+        public static string Product(this System.Web.Mvc.UrlHelper urlHelper, string sku)
+        {
+            return urlHelper.Action("Product", "Products", new { id = sku });
+        }
+    }
+}