gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace planner_newsletter.planner_newsletter_control
{
    public partial class PlannerNewsletterControl : System.Web.UI.UserControl
    {

        private string _email;
        public string email
        {
            get { return _email; }
            set { _email = value; }
        }

        protected void Page_Load(object sender, EventArgs e)
        {

            TextBox1.Text = email;

        }

    }
}