Взаимодействие с HTTP, сжатый формат

public static string LoadXML(string SiteAddr)
{
    try
    {
        HttpWebRequest reqGET = WebRequest.Create(SiteAddr) as HttpWebRequest;
        reqGET.CookieContainer = cookieCont;
        reqGET.Timeout = 200000;
        reqGET.AllowAutoRedirect = true;
        reqGET.KeepAlive = true;
        reqGET.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18";
        reqGET.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
        reqGET.Headers.Add("Accept-Language: ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3");
        reqGET.Headers.Add("Accept-Encoding: gzip,deflate");
        reqGET.Headers.Add("Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.7");
        reqGET.Headers.Add("Keep-Alive: 115");
        reqGET.KeepAlive = true;
        reqGET.ContentType = "application/x-www-form-urlencoded";
        
        reqGET.Headers.Add("RequestTarget: AJAXService");
 
        if (Settings.UseProxy)
        {
            WebProxy proxy = new WebProxy(Settings.ProxyAddr, Settings.ProxyPort);
            reqGET.Proxy = proxy;
        }
        resp = reqGET.GetResponse();
       
        enc = Encoding.UTF8;
 
        StreamReader sr = new StreamReader(resp.GetResponseStream(), enc);
 
        return sr.ReadToEnd();
    }
    catch
    {
        return "";
    }
}

reqGET.AutomaticDecompression = DecompressionMethods.GZip

reqGET.AutomaticDecompression = DecompressionMethods.Deflate;