Save and retrieve information from the cookie (specifying an expire time)

Saving information in the cookie and specifying an expire time

 protected void LoginButton_Click(object sender, EventArgs e)
    {
        string username = NameTextBox.Text;
        
        HttpCookie cookie =  new HttpCookie("UserInfo");
        cookie["Username"] = username;
        cookie.Expires = DateTime.Now.AddDays(1);
        Response.Cookies.Add(cookie);

    }

Retrieving information

protected void Page_Load(object sender, EventArgs e)

    {
        HttpCookie cookie = Request.Cookies["UserInfo"];
        if(cookie!=null)
        {
            string username = cookie["Username"];
            if (username != null)
            {
                Response.Redirect("OrderPage.aspx?Username=" + username);
                return;
            }
        }
        Response.Redirect("Login.aspx");
    }