public ActionResult DeleteCustomer(int id, Kunde slettKunde)
        {
            if (loginCheck() == false)
            {
                return(RedirectToAction("LoggInn"));
            }
            var  kundeDb = new KundeBLL();
            bool slettOK = kundeDb.deleteCustomer(id);

            if (slettOK)
            {
                return(RedirectToAction("ListCustomers"));
            }
            return(View());
        }