Web/BasePage.cs

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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;

namespace ClothesShop.Web
{
    public class BasePage : System.Web.UI.Page
    {
        protected override void SavePageStateToPersistenceMedium(object state)
        {
            LosFormatter formatter = new LosFormatter();
            StringWriter writer = new StringWriter();
            formatter.Serialize(writer, state);
            string viewState = writer.ToString();
            byte[] data = Convert.FromBase64String(viewState);
            byte[] compressedData = ViewStateHelper.Compress(data);
            string str = Convert.ToBase64String(compressedData);
            ClientScript.RegisterHiddenField("__MYVIEWSTATE", str);
        }

        protected override object LoadPageStateFromPersistenceMedium()
        {
            string viewstate = Request.Form["__MYVIEWSTATE"];
            byte[] data = Convert.FromBase64String(viewstate);
            byte[] uncompressedData =
             ViewStateHelper.Decompress(data);
            string str = Convert.ToBase64String(uncompressedData);
            LosFormatter formatter = new LosFormatter();
            return formatter.Deserialize(str);
        } 
    }
}