通过 pp7 上的 api 登录 mediawiki

我正在尝试为wp7创建一个应用程序来登录维基百科并帮助翻译页面。我一开始就被困住了，因为我无法让它通过mediawiki API登录。代码的相关部分如下所示：

        data.Append("action=login&lgname" + HttpUtility.UrlEncode(textBox1.Text));
        data.Append("&lgpassword=" + HttpUtility.UrlEncode(passwordBox1.Password));
        request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback),request);
        request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
        public void GetRequestStreamCallback(IAsyncResult asynchronousResult)
        {
           HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
           Stream postStream = request.EndGetRequestStream(asynchronousResult);
           byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());
           postStream.Write(byteData, 0, data.Length);
           postStream.Close();
        }
        private static void GetResponseCallback(IAsyncResult asynchronousResult)
        {
           HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
           HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
           Stream streamResponse = response.GetResponseStream();
           StreamReader streamRead = new StreamReader(streamResponse);
           string responseString = streamRead.ReadToEnd();
           streamResponse.Close();
           streamRead.Close();
           response.Close();
    }

问题是：

在 GetRequestStreamCallback 上，我无法从 main 函数传递数据字符串。我该怎么做？

在 GetResponseCallback 函数上，如何返回响应字符串字符串以便以后可以输出？