ASP.NET MVC QUERY

public class UserController : Controller 

{ 

private Entities db = new Entities(); 

public ActionResult Index() 

{ 

int userId = (int)Session["LoggedUserID"]; 

var user = db.Users.SingleOrDefault(u=>u.UserId==userId); 

if (user != null) return View(user); // this return View(); 

} 

}

please help me.