Smart refence state class for web apps

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.Web.SessionState;

public partial class _Default : System.Web.UI.Page
{
    MyState _state = null;

    protected void Page_Load(object sender, EventArgs e)
    {
        this._state = MyState.Init(this.Session);
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        this._state.Antal += 1;
        _tbAntal.Text = this._state.Antal.ToString();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        this._state.Antal += 3;
        _tbAntal.Text = this._state.Antal.ToString();
    }
}

class MyState
{
    const string _name = "{1374BFDE-B051-4fa3-8A7A-E506233B2AB6}";

    public int Antal = 0;

    public static MyState Init( HttpSessionState state )
    {
        MyState s = null;
        if(state[_name] == null)
        {
            s = new MyState();
            state[_name] = s;
        }
        else
            s = state[_name] as MyState;

        return s;
    }
}