protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {

                using (System.IO.StreamWriter writer = new System.IO.StreamWriter(@"D:\IDs.txt", true)) //(Server.MapPath("~/data.txt")
                {
                    writer.WriteLine(idNum.Text);
                    //writer.WriteLine(HttpContext.Current.Request.UserHostAddress);
                }
                Button1.Text = "נשלח בהצלחה";
                Button1.Enabled = false;
                //Response.Redirect("FormConfirmationPage.html");
                Response.Redirect("Default.aspx");
            }
            catch
            {
                // There was an error in writing to the file but I couldn't care less.
            }