[Authorize(Roles="Admin")]
        //[Authorize(Users="")]
        public Product GetProductById(int Id)
        {
            var product = Products.FirstOrDefault(p => p.Id == Id);
            if(product==null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound); 
            }
            return product; 
        }

 $.getJSON("api/products/"+id,
                function (data) {
                    var str = data.Name + '   ' + data.Price;
                    $('#products').empty();
                    $('#products').html(str);
                }
                );