// GET: Admin/ProductType/Details/5
        public async Task <ActionResult> Details(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            ProductType productType = await db.Database.SqlQuery <ProductType>("select * from producttype where id=@p0", id).SingleOrDefaultAsync();

            if (productType == null)
            {
                return(HttpNotFound());
            }
            var model = await productType.Convert(db);

            return(View(model));
        }