public static byte[] GetHtmlByBytes(string server, string URL, byte[] byteRequest, string cookie,out string header)
        {
            long contentLength;
            HttpWebRequest httpWebRequest;
            HttpWebResponse webResponse;
            Stream getStream;

            httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(URL);
            CookieContainer co = new CookieContainer();
            co.SetCookies(new Uri(server), cookie);

            httpWebRequest.CookieContainer = co;

            httpWebRequest.ContentType = "application/x-www-form-urlencoded";
            httpWebRequest.Accept = "*/*";
            httpWebRequest.Referer = "http://china.
            httpWebRequest.UserAgent =
                "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Maxthon 2.0)";
            httpWebRequest.Method = "Post";
            httpWebRequest.ContentLength = byteRequest.Length;
            Stream stream;
            stream = httpWebRequest.GetRequestStream();
            stream.Write(byteRequest, 0, byteRequest.Length);
            stream.Close();
            webResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            header = webResponse.Headers.ToString();
            getStream = webResponse.GetResponseStream();
            contentLength = webResponse.ContentLength;

            byte[] outBytes = new byte[contentLength];  //在这提示算术运算导致溢出的错误...怎么解决？
            outBytes = ReadFully(getStream);
            getStream.Close();
            return outBytes;
        }
有没有高手有更好的方法！！！！！！！！