HttpWebRequest读取网页源码转字符串不完整问题

在读取网站源码时发现部分页面读到的内容不完整，浏览器打开正常

1 说明不是人家服务器问题

2 fiddler里打开发现也不完整，而且乱码，但在transformer里设置成 no compression 后也正常。说明读取的东西是完整的，是后续处理的问题

3 c#里调试发现读取的字符串被截断，copy字符串到notepad++里发现被截断的地方有\0\0,原来如此,\0表示字符串结su呢

处理的方法如下：

try
{
strUrl = "http://www.xxx.com";
                
                CookieContainer cc = new CookieContainer();
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strUrl);

                request.Method = "Get";
                request.CookieContainer = cc;
                request.KeepAlive = true;
                request.ContentType = "text/html";
                request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36";
                request.Headers.Add("x-requested-with:XMLHttpRequest");
                request.Headers.Add(HttpRequestHeader.AcceptLanguage, "zh-CN,zh;q=0.8,en;q=0.6,nl;q=0.4,zh-TW;q=0.2");
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
                request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip |
                                                 DecompressionMethods.None;
                request.Headers.Add("Accept-Encoding", "gzip, deflate");
                if (request.Method == "POST")
                {
                    (request as HttpWebRequest).ContentType = "application/x-www-form-urlencoded";
                }

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                //StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("gb2312"));
                StreamReader reader = new StreamReader(response.GetResponseStream(), encoder);

                strMsg = reader.ReadToEnd();
                // .\0为null，空字符，也是字符串结束标志
                strMsg = strMsg.Replace("\0", "");

                reader.Close();
                reader.Dispose();
                response.Close();


            }
            catch
            { }