Redirect page based on User Role after Login in ASP.Net MVC

Hi,

I want to redirect my page to different view based on user role after login.

I tried to use if else condition but it didn't work.

Here is my code 

        public ActionResult Login(CertModel login, string ReturnUrl = "")
        {            
            using (certsEntities db = new certsEntities())
            {
                var v = db.tblUsers.Where(a => a.username == login.username && a.password==login.password).FirstOrDefault();
                if (v != null)
                {
                    FormsAuthentication.SetAuthCookie(v.username, false);
                    TempData["UserID"] = v.operator_id.ToString();
                    TempData["Username"] = v.username;
                    TempData["role"] = v.role;

                    if(v.role == "Admin")
                    {
                        return RedirectToAction("AdminIndex", "Home");
                    }
                    else
                    {
                        return RedirectToAction("Index", "Home");
                    }                   
                }
                else
                {
                    ModelState.AddModelError("", "Incorrect Username or Password or User is no longer available.");
                }
            }

            return View();
        }