public IActionResult Index()
        {
            var context = new EmployeeContext();
            var employees = context.Employees.ToList();

            return View(new IndexViewModel { Employees = employees });
        }
        public IActionResult Index(IndexViewModel viewModel)
        {
            var context = new EmployeeContext();
            context.Employees.Add(viewModel.NewEmployee);
            context.SaveChanges();

            var employees = context.Employees.ToList();
            return View(new IndexViewModel { Employees = employees });
        }