public PartialViewResult Search(string firstName, string lastName)
        {
            var criteria = new EmployeeSearchCriteria
            {
                FirstName = firstName,
                LastName = lastName,
            };
            _employees = _dataService.FetchList<EmployeeInfoList, Employee>(criteria);

            return PartialView("_Employees", _employees);
        }
        public ActionResult Index()
        {
            _employees = _dataService.FetchList<EmployeeInfoList, Employee>(null);

            return View(_employees);
        }