public RedirectToRouteResult AuthCallback()
        {
            string qry = System.Web.HttpContext.Current.Request.Url.Query;
            var qstr = HttpUtility.ParseQueryString(qry);

            string verifier = qstr["oauth_verifier"];

            if (null == verifier || verifier.Length == 0)
            {
                //NetLog.WriteTextLog("</br>Invalid PIN." + "</br>" + "-----------------------" + "</br>");
                return RedirectToAction("AuthenticationFailed", new { reason = "Invalid PIN." });
            }

            // Build the HTTP request for an access token
            var request = new RestRequest("OAuth/AccessToken", Method.POST);

            m_Client.Authenticator = OAuth1Authenticator.ForAccessToken(
               m_ConsumerKey, m_ConsumerSecret, m_oAuthReqToken, m_oAuthReqTokenSecret,
               verifier);

            // Execute the access token request
            var response = m_Client.Execute(request);

            // The request for access token is successful. Parse the response and store token,token secret and session handle
            var qs = HttpUtility.ParseQueryString(response.Content);
            m_oAuthAccessToken = qs["oauth_token"];
            m_oAuthAccessTokenSecret = qs["oauth_token_secret"];
            var x_oauth_user_name = qs["x_oauth_user_name"];
            var x_oauth_user_guid = qs["x_oauth_user_guid"];
            var x_scope = qs["x_scope"];
            var xoauth_problem = qs["xoauth_problem"];
            var oauth_error_message = qs["oauth_error_message"];
            m_sessionHandle = qs["oauth_session_handle"];

            OAuthResult result = new OAuthResult();
            result.AccessToken = m_oAuthAccessToken;
            result.AccessTokenSecret = m_oAuthAccessTokenSecret;
            result.oauth_user_name = x_oauth_user_name;
            result.oauth_user_guid = x_oauth_user_guid;
            result.scope = x_scope;
            result.oauth_problem = xoauth_problem;
            result.oauth_error_message = oauth_error_message;
            result.sessionHandle = m_sessionHandle;

            return RedirectToAction("AuthenticationSucceed", "Authenticate", result);
        }
 public ActionResult AuthenticationSucceed(OAuthResult result)
 {
     ViewBag.userId = result.oauth_user_guid;
     return View(result);
 }