c# - ユーザー ID を追加するにはどうすればよいですか? mvc4 で Cookie を認証するには

Question

ユーザー ID TI AUTHENTICATED A Cookie を追加する方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.Security.Cryptography;
using System.Text;

namespace project.Controllers
{
    public class LoginController : Controller
    {
        // GET: /Login/
        private DataContext db = new DataContext();

        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult index(Loginmodel model)
        {
            if (ModelState.IsValid)
            {
                String username = model.Username;
                User Login = db.Users.Where(m => m.Name == username).First();
                String pass = Convert.ToBase64String(new MD5CryptoServiceProvider().ComputeHash(new UTF8Encoding().GetBytes(model.Password)));

                if (Login != null && pass == Login.Password)
                {
                    FormsAuthentication.SetAuthCookie(model.Username, false);
                    return RedirectToAction("index", "Project");
                }

                ModelState.AddModelError("", "Invalid username or password");
            }

           return View();
        }            
    }
}