在同一服务器上调用WCF服务时,我使用附加的代码.我在调用WebReq.GetRequestStream()时随机获取超时错误

当我检查netstat时,我看到连接保持打开状态,所以可能有问题,但是我不知道如何解决它

//request inicialization
        HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(url);
        WebReq.Method = "POST";
        WebReq.ContentType = "application/json; charset=utf-8";
        WebReq.ContentLength = buffer.Length;

        WebReq.Proxy = null;
        WebReq.KeepAlive = false; //also tried with true
        WebReq.AllowWriteStreamBuffering = false; //also tried with true

        //this produces an error
        using (Stream PostData = WebReq.GetRequestStream())
        {
            PostData.Write(buffer,buffer.Length);
            PostData.Close();
        }

         //open and read response
         HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
         Stream Answer = WebResp.GetResponseStream();
         StreamReader _Answer = new StreamReader(Answer);

         WebResp.Close();

         //return string
         return _Answer.ReadToEnd();

超时在大概10秒的空闲时间之后抛出,而且在这行中还有五个左右的请求.真的找不到一个模式.

这段代码可能是错的？是否有其他(更好)的方式调用WCF服务？