A more efficient webclient for .NET

using System.Net;
using System.Net.Cache;
using System;

namespace SharpGIS
{
    /// <summary>
    /// A more efficient WebClient for .NET.
    /// Automatically uses GZIP/Deflate if the server supports it
    /// and caches responses if the server response contains a cache-
    /// header (ie. 'expires' or 'ETag').
    /// </summary>
    public class GZipWebClient : WebClient
    {
        public GZipWebClient()
        {
            //Use the browser cache if the server tells us the response is cacheable
            CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default);
        }
        protected override System.Net.WebRequest GetWebRequest(Uri address)
        {
            System.Net.WebRequest wr = base.GetWebRequest(address);
            //Support GZIP and Deflate compressed responses from server
            ((HttpWebRequest)wr).AutomaticDecompression =
                DecompressionMethods.GZip | DecompressionMethods.Deflate;
            return wr;
        }
    }
}