HttpWebRequest & Native GZip Compression

Question

When requesting a page with Gzip compression I am getting a lot of the following errors:

System.IO.InvalidDataException: The CRC in GZip footer does not match the CRC calculated from the decompressed data

I am using native GZipStream to decompress and am looking at addressing this. With that in mind is there a work around for addressing this or another GZip library (free?) which will handle this issue properly?

I am verifying the webResponse ContentEncoding is GZIP

Update 5/11 A simplified snippit

//Caller
public void SOSampleGet(string url) 
{
    // Initialize the WebRequest.
    webRequest = (HttpWebRequest)WebRequest.Create(url);
    webRequest.Method = WebRequestMethods.Http.Get;
    webRequest.KeepAlive = true;
    webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
    webRequest.Headers.Add("Accept-Encoding", "gzip,deflate");
    webRequest.Referer = WebUtil.GetDomain(url);

    HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();    

    using (Stream stream = GetStreamForResponse(webResponse, READTIMEOUT_CONST))
    {
        //use stream
    }
}

//Method
private static Stream GetStreamForResponse(HttpWebResponse webResponse, int readTimeOut)
{
    Stream stream;
    switch (webResponse.ContentEncoding.ToUpperInvariant())
    {
        case "GZIP":
            stream = new GZipStream(webResponse.GetResponseStream(), CompressionMode.Decompress);
            break;
        case "DEFLATE":
            stream = new DeflateStream(webResponse.GetResponseStream(), CompressionMode.Decompress);
            break;

        default:
            stream = webResponse.GetResponseStream();
            stream.ReadTimeout = readTimeOut;
            break;
        }    
    return stream;
}

Answer 1

What about the webrequest AutomaticDecompression Property available since .net 2? Simply add:

webRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;

It also adds the gzip,deflate to the accept encoding header.

See http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.automaticdecompression.aspx