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.Net; 

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        HttpCookie cookie = Request.Cookies["pref"];
        if (cookie == null)
        {
            Label1.Text = "Un known Customer";
        }
        else
        {
            Label1.Text = "Welcome " + cookie["name"];

        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        HttpCookie cookie = Request.Cookies["pref"];
        if (cookie == null)
        {
            cookie = new HttpCookie("pref");
        }
        cookie["name"] = TextBox1.Text;
        cookie.Expires = DateTime.Now.AddMonths(5);
        Response.Cookies.Add(cookie);
        Label1.Text = "New customer" + cookie["name"];
    }
}