WebForms example using Skybrud.Social for Twitter OAuth authentication

Twitter OAuth.aspx..cs

using System;
using Skybrud.Social.OAuth;
using Skybrud.Social.Twitter;
using Skybrud.Social.Twitter.OAuth;
using Skybrud.Social.Twitter.Objects;

namespace Skybrud.Social.Test.Twitter {
    
    public partial class OAuth : System.Web.UI.Page {

        public string Action {
            get { return Request.QueryString["do"]; }
        }

        public string AuthorizationCode {
            get { return Request.QueryString["code"]; }
        }

        protected void Page_Load(object sender, EventArgs e) {

            // Initialize a new OAuth client with information about your app
            TwitterOAuthClient oauth = new TwitterOAuthClient {
                ConsumerKey = "Your Twitter API key",
                ConsumerSecret = "Your Twitter API secret",
                Callback = "Your callback URL"
            };

            if (Request.QueryString["do"] == "login") {

                // Get a request token from the Twitter API
                OAuthRequestToken token = oauth.GetRequestToken();

                // Save the token information to the session so we can grab it later
                Session[token.Token] = token;

                // Redirect the user to the authentication page at Twitter.com
                Response.Redirect(token.AuthorizeUrl);

            } else if (Request.QueryString["oauth_token"] != null) {

                // Get OAuth parameters from the query string
                string oAuthToken = Request.QueryString["oauth_token"];
                string oAuthVerifier = Request.QueryString["oauth_verifier"];

                // Grab the request token from the session
                OAuthRequestToken token = Session[oAuthToken] as OAuthRequestToken;

                if (token == null) {

                    Content.Text = "<p>An error occured. Timeout?</p>";

                } else {

                    // Some information for development purposes
                    Content.Text += "<p>Request Token: " + token.Token + "</p>";
                    Content.Text += "<p>Request Token Secret: " + token.TokenSecret + "</p>";

                    // Update the OAuth client with information from the request token
                    oauth.Token = token.Token;
                    oauth.TokenSecret = token.TokenSecret;

                    try {

                        // Obtain an access token from the request token and OAuth verifier
                        OAuthAccessToken accessToken = oauth.GetAccessToken(oAuthVerifier);

                        // Update the OAuth client with the access token and access token secret
                        oauth.Token = accessToken.Token;
                        oauth.TokenSecret = accessToken.TokenSecret;

                        // Initialize a new TwitterService instance based on the OAuth client
                        TwitterService service = TwitterService.CreateFromOAuthClient(oauth);

                        // Get information about the authenticated user
                        TwitterUser user = service.Account.VerifyCredentials();

                        // Some information for development purposes
                        Content.Text += "<b>Hi " + (user.Name ?? user.ScreenName) + "</b> (" + user.Id + ")<br />";
                        Content.Text += "<p>Access Token: " + accessToken.Token + "</p>";
                        Content.Text += "<p>Access Token Secret: " + accessToken.TokenSecret + "</p>";

                    } catch (Exception ex) {

                        Content.Text += "<pre style=\"color: red;\">" + ex.GetType().FullName + ": " + ex.Message + "\r\n\r\n" + ex.StackTrace + "</pre>";

                    }

                }

            } else if (Request.QueryString["denied"] != null) {

                // Get OAuth parameters from the query string
                string oAuthToken = Request.QueryString["denied"];

                // Remove the request token from the session
                Session.Remove(oAuthToken);

                // Write some output for the user
                Content.Text += "<p>It seems that you cancelled the login!</p>";
                Content.Text += "<p><a href=\"OAuth.aspx?do=login\">Try again?</a></p>";

            } else {

                Content.Text += "<p><a href=\"OAuth.aspx?do=login\">Login with Twitter</a></p>";

            }

        }
    
    }

}