public ActionResult hentAlleBoker()
        {
            if (Session["AdminLoggetInn"] != null)
            {
                bool loggetInn = (bool)Session["AdminLoggetInn"];
                if (loggetInn)
                {
                    List <Boken> boker = _adminBLL.hentAlleBoker();
                    return(View(boker));
                }
            }

            return(RedirectToAction("Index"));
        }