他妈的一个采集做了这么久，C#竟然这么复杂。
private string GetContent(string PageUrl)
        {
            WebRequest request = WebRequest.Create(PageUrl);
            WebResponse response = request.GetResponse();
            Stream resStream = response.GetResponseStream();
            Encoding enc = Encoding.GetEncoding("GB2312");
            StreamReader sr = new StreamReader(resStream, enc);
            return sr.ReadToEnd();
            //resStream.Close();
            //sr.Close();
        }