public ActionResult Logout()
        {
            //ApplicationSession.LoginUserID = 0;
            string   connectionString = ConfigurationManager.ConnectionStrings["NHSConStr"].ConnectionString;
            DBEngine dBEngine         = new DBEngine(connectionString);
            int      dbReturn         = dBEngine.UpdateLogoutDateTime(Convert.ToInt32(Session["LoginUserID"]));

            Session.RemoveAll();
            return(RedirectToAction("Index", "Account"));
        }