由于系统缓冲区空间不足或队列已满，不能执行套接字上的操作

[hhh305743261]

public static string HttpPost(string url, string queryString)
{
StreamWriter requestWriter = null;
string responseData = null;
HttpWebRequest webRequest = WebRequest.Create(url) as HttpWebRequest;
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.ServicePoint.Expect100Continue = false;
webRequest.Timeout = 20000;
webRequest.KeepAlive = false;
requestWriter = new StreamWriter(webRequest.GetRequestStream());//执行到这里就出错了。
requestWriter.Write(queryString);
requestWriter.Close();
requestWriter = null;
responseData = WebResponseGet(webRequest);
webRequest = null;
return responseData;
}

在本地测试是通过的。 放服务器上报错。
请问各位大侠 小弟应该如何处理？

[haa17]

 #region 同步通过POST方式发送数据
       /// <summary>
       /// 通过POST方式发送数据
       /// </summary>
       /// <param name="Url">url</param>
       /// <param name="postDataStr">Post数据</param>
       /// <param name="cookie">Cookie容器</param>
       /// <returns></returns>
       public string SendDataByPost(string Url,string postDataStr,ref CookieContainer cookie)
       {
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
         if (cookie.Count == 0)
         {
            request.CookieContainer = new CookieContainer();
            cookie = request.CookieContainer;
         }
         else
         {
            request.CookieContainer = cookie;
         }

         request.Method = "POST";
         request.ContentType = "application/x-www-form-urlencoded";
         request.ContentLength = postDataStr.Length;
         Stream myRequestStream = request.GetRequestStream();
         StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
         myStreamWriter.Write(postDataStr);
         myStreamWriter.Close();

         HttpWebResponse response = (HttpWebResponse)request.GetResponse();
         Stream myResponseStream = response.GetResponseStream();
         StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
         string retString= myStreamReader.ReadToEnd();
         myStreamReader.Close();
         myResponseStream.Close();

         return retString;
       }
       #endregion

 myStreamReader.Close();
         myResponseStream.Close();

声明了，最后记得关闭。