public ActionResult Create(FormCollection collection, ProductDetail productDetail, int productID)
 {
     //Product product = _entities.Products.SingleOrDefault(a => a.ID == productID);
     try
     {
         //product.ProductDetails.Add(productDetail);
         _entities.AddToProductDetails(productDetail);
         _entities.SaveChanges();
         return(RedirectToAction("Index", "ProductDetail", new { productID = productID }));
     }
     catch
     {
         return(View());
     }
 }