public ActionResult GetStatesByCountryId(string countryId)
        {
            if (String.IsNullOrEmpty(countryId))
            {
                throw new ArgumentNullException("countryId");
            }
            int           id      = 0;
            bool          isValid = Int32.TryParse(countryId, out id);
            IList <State> states  = _myRepo.GetAllStatesByCountryId(id);
            var           result  = (from s in states
                                     select new
            {
                id = s.Id,
                name = s.Name,
                tax = s.Tax.ToString()
            }).ToList();

            return(Json(result, JsonRequestBehavior.AllowGet));
        }