public ActionResult LoginOut() { FormsAuthenticationHelper.Signout(); var request = HttpContext.Request; string authUrl = ConfigHelper.AuthUrl; string clientId = ConfigHelper.ClientId; string secret = ConfigHelper.Secret; string ReturnURL = request.Url.AbsoluteUri; string ssoUrl = string.Format("{0}/Identity/LoginOut?ClientId={1}&Secret={2}&ReturnURL={3}", authUrl, clientId, secret, ReturnURL); return(Redirect(ssoUrl)); }