如何使用wpf应用程序在twitter上共享数据或消息

我在Twitter上实现共享数据时有麻烦。有人有使用WPF应用程序共享数据的示例代码吗??

这是WPF中遵循的代码:

在这里，我得到HttpRequest错误。

 private void button1_Click(object sender, RoutedEventArgs e)
    {
        var oauth_consumer_key = "XXX";
        var oauth_consumer_secret = "YYY";
        if(Request["oauth_token"] == null)
        {
            OAuthTokenResponse reqToken = OAuthUtility.GetRequestToken(
                oauth_consumer_key,
                oauth_consumer_secret,
                Request.Url.AbsoluteUri);
            NavigationService nav = NavigationService.GetNavigationService(this);
            nav.Navigate(string.Format("http://twitter.com/oauth/authorize?oauth_token={0}", reqToken.Token, UriKind.Relative));               
        }
        else
        {
            string requestToken = Request["oauth_token"].ToString();
            string pin = Request["oauth_verifier"].ToString();
            var tokens = OAuthUtility.GetAccessToken(
                oauth_consumer_key,
                oauth_consumer_secret,
                requestToken,
                pin);
            OAuthTokens accesstoken = new OAuthTokens()
            {
                AccessToken = tokens.Token,
                AccessTokenSecret = tokens.TokenSecret,
                ConsumerKey = oauth_consumer_key,
                ConsumerSecret = oauth_consumer_secret
            };
            TwitterResponse<TwitterStatus> response = TwitterStatus.Update(
                accesstoken,
                "Testing!! It works (hopefully).");
            if (response.Result == RequestResult.Success)
            {
                MessageBox.Show("we did it!");
            }
            else
            {
                MessageBox.Show("it's all bad.");
            }
        }
    }