Logout in MVC using session that Logout when session expires

View:

<a href="@Url.Content("~/Home/Logout")">Logout</a>

Home Controller:

public ActionResult Logout()

{

    Session.Abandon();

    return RedirectToAction("Index");

}

Base Controller:

protected override void OnActionExecuting(ActionExecutingContext filterContext)

{

    if (Session["User"] != null)

    {

        UDTO = (AccountDTO)HttpContext.Session[AccountController.USER];

    }

    else

    {

        filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary{ { "action", "Logout" }, { "controller", "Home" }, {"area",""} });

    }

    base.OnActionExecuting(filterContext);

}