asp.net2.0下 如何?伺服器端壓縮包自解壓

asp.net2.0下，如何?伺服器端壓縮包自解壓using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.IO.Compression;

/**//// <summary>
/// ZipUtility 的摘要說明
/// </summary>
public class ZipUtility
{
    public ZipUtility()
    {
        //
        // TODO: 在此處添加建構函式邏輯
        //
    }

    public static void Compress(Stream source, Stream destination)
    {

        using (GZipStream output = new GZipStream(destination, CompressionMode.Compress))
        {

            Pump(source, output);

        }

    }



    public static void Decompress(Stream source, Stream destination)
    {

        using (GZipStream input = new GZipStream(source, CompressionMode.Decompress))
        {

            Pump(input, destination);

        }

    }



    private static void Pump(Stream input, Stream output)
    {

        byte[] bytes = new byte[4096];

        int n;

        while ((n = input.Read(bytes, 0, bytes.Length)) != 0)
        {

            output.Write(bytes, 0, n);

        }

    }

}
簡單應用：
protected void Button1_Click(object sender, EventArgs e)
    {
        FileStream fs=File.OpenWrite("d:/Data.txt");
        Stream c=this.FileUpload1.PostedFile.InputStream;
        ZipUtility.Decompress(c, fs);
        fs.Close();
        c.Close();

    }