HtmlAgilityPack HtmlWeb.Load() 不支持 gzip 的解决方法

_htmlWeb = new HtmlWeb();
HtmlWeb.PreRequestHandler handler = delegate (HttpWebRequest request)
{
request.Headers[HttpRequestHeader.AcceptEncoding] = "gzip, deflate";
request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
request.CookieContainer = new System.Net.CookieContainer();
return true;
};
_htmlWeb.PreRequest += handler;