C#模拟登录Twitter并发送私信

static void Main(string[] args)
        {
            GetCookie("UserName", "PassWord");
            Console.ReadLine();
        }

        public static void GetCookie(string UserName, string PassWord)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            try
            {
                CookieContainer cookie = new CookieContainer();
                request = (HttpWebRequest)HttpWebRequest.Create("https://twitter.com/login/");
                request.Timeout = 180000;
                request.Method = "GET";
                request.Host = "twitter.com";
                request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0";
                //reqsessionGet.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36";
                request.AddRange(1024);
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
                request.Headers["Accept-Language"] = "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3";
                request.CookieContainer = cookie;
                request.KeepAlive = true;

                response = (HttpWebResponse)request.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream());
                string content = sr.ReadToEnd();
                sr.Close();
                response.Close();
                //string Token = Regex.Match(content, @"<input type=""hidden"" value=""(\w+)"" name=""authenticity_token""/>").Groups[1].Value;
                //获取Token字符串
                HtmlDocument doc = new HtmlDocument();
                doc.LoadHtml(content);
                string XPath = "//input[@name=‘authenticity_token‘]";
                if (doc.DocumentNode.SelectNodes(XPath) != null)
                {
                    string Token = doc.DocumentNode.SelectSingleNode(XPath).Attributes["value"].Value;
                    Login(UserName, PassWord, Token, cookie);
                }
            }
            catch (Exception)
            {
                request.Abort();
                response.Close();
                Console.WriteLine("获取Token字符串失败，请检查网络连接");
            }
        }

        public static void Login(string UserName, string PassWord, string Token, CookieContainer cookie)
        {
            string PostStr = "session%5Busername_or_email%5D=" + UserName + "&session%5Bpassword%5D=" + PassWord + "&authenticity_token=" + Token + "&scribe_log=&redirect_after_login=&authenticity_token=" + Token;
            byte[] Data = Encoding.UTF8.GetBytes(PostStr);
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create("https://twitter.com/sessions");
                request.Timeout = 180000;
                request.Method = "POST";
                request.Host = "twitter.com";
                request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.132 Safari/537.36";
                //reqsession.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36";
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
                request.Headers["Accept-Language"] = "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3";
                request.Referer = "https://twitter.com/";
                request.CookieContainer = cookie;
                request.KeepAlive = true;
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = Data.Length;
                Stream requestStream = request.GetRequestStream();
                requestStream.Write(Data, 0, Data.Length);
                requestStream.Close();

                response = (HttpWebResponse)request.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                string content = sr.ReadToEnd();
                sr.Close();
                response.Close();
                if (content.Contains("查看个人资料"))
                {
                    Console.WriteLine("Twitter登录成功");
                    SendMsg(Token, cookie);
                }
                else
                {
                    Console.WriteLine("Twitter登录失败");
                }
            }
            catch (Exception)
            {
                request.Abort();
                response.Close();
                Console.WriteLine("登录失败，请检查网络连接");
            }
        }

        public static void SendMsg(string Token, CookieContainer cookie)
        {
            Console.WriteLine("-----------发送私信-----------");
            Console.Write("请输入收件人：");
            string Receiver = Console.ReadLine();
            Console.Write("请输入发送内容：");
            string Msg = Console.ReadLine();

            string PostStr = "authenticity_token=" + Token + "&screen_name%5B%5D=" + Receiver + "&scribeContext%5Bcomponent%5D=tweet_box_dm&tagged_users=&text=" + Msg + "&tweetboxId=swift_tweetbox_1472018056979";
            HttpHelper http = new HttpHelper();
            string html = http.GetHtml("https://twitter.com/i/direct_messages/new", cookie, PostStr, true);
            Console.WriteLine(html);
            if (html.Contains("该用户没有关注你") || html.Contains("你只可以发送私信给关注你的人"))
            {
                Console.WriteLine("您输入的用户名不存在，或该用户没有关注你，你只可以发送私信给关注你的人");
            }
            else if (html.Contains(@"\u003e"))
            {
                Console.WriteLine("发送成功");
            }
        }

HttpHelper为HttpWebRequest封装类。