public JsonResult Add(string productData)
 {
     var result = new ProductRepository().Add(JsonConvert.DeserializeObject<Product>(productData));
     return Json(result, JsonRequestBehavior.AllowGet);
 }
 public object Get(int productID)
 {
     var result = new ProductRepository().Get(productID);
     return Json(result, JsonRequestBehavior.AllowGet);
 }