Compress ViewState

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.IO.Compression;

/// <summary>
/// Summary description for ViewStateCompressor
/// </summary>
public class ViewStateCompressor
{
public ViewStateCompressor()
{
//
// TODO: Add constructor logic here
//
}
    public static byte[] CompressViewState(byte[] uncompData)
    {
        using (MemoryStream mem = new MemoryStream())
        {
            CompressionMode mode = CompressionMode.Compress;
            // Use the newly created memory stream for the compressed data.
            using (GZipStream gzip = new GZipStream(mem, mode, true))
            {
                //Writes compressed byte to the underlying
                //stream from the specified byte array.
                gzip.Write(uncompData, 0, uncompData.Length);
            }
            return mem.ToArray();
        }
    }

    public static byte[] DecompressViewState(byte[] compData)
    {
        GZipStream gzip;
        using (MemoryStream inputMem = new MemoryStream())
        {
            inputMem.Write(compData, 0, compData.Length);
            // Reset the memory stream position to begin decompression.
            inputMem.Position = 0;
            CompressionMode mode = CompressionMode.Decompress;
            gzip = new GZipStream(inputMem, mode, true);


            using (MemoryStream outputMem = new MemoryStream())
            {
                // Read 1024 bytes at a time
                byte[] buf = new byte[1024];
                int byteRead = -1;
                byteRead = gzip.Read(buf, 0, buf.Length);
                while (byteRead > 0)
                {
                    //write to memory stream
                    outputMem.Write(buf, 0, byteRead);
                    byteRead = gzip.Read(buf, 0, buf.Length);
                }
                gzip.Close();
                return outputMem.ToArray();
            }
        }
    }
}
-----------------------------in page
pages smartNavigation="true" enableEventValidation="false" maxPageStateFieldLength="5000" viewStateEncryptionMode="Never" 
-----------------------------in page cs

 protected override void SavePageStateToPersistenceMedium(object pageViewState)
    {
        LosFormatter losformatter = new LosFormatter();
        StringWriter sw = new StringWriter();
        losformatter.Serialize(sw, pageViewState);
        string viewStateString = sw.ToString();
        byte[] b = Convert.FromBase64String(viewStateString);
        b = ViewStateCompressor.CompressViewState(b);
        ClientScript.RegisterHiddenField("__CUSTOMVIEWSTATE", Convert.ToBase64String(b));
    }

    // Deserialize view state
    protected override object LoadPageStateFromPersistenceMedium()
    {
        string custState = Request.Form["__CUSTOMVIEWSTATE"];
        byte[] b = Convert.FromBase64String(custState);
        b = ViewStateCompressor.DecompressViewState(b);
        LosFormatter losformatter = new LosFormatter();
        return losformatter.Deserialize(Convert.ToBase64String(b));
    }