protected void Page_Load(object sender, EventArgs e)
    {
        ArrayList elenco = new ArrayList();
        for (int i = 0; i <= 16; i++)
        {
            elenco.Add(i);
        }


        string path = Environment.GetEnvironmentVariable("TEMP") + "\\ListaNumero.xls";
        string path_2=Environment.GetEnvironmentVariable("TEMP");

        using (FileStream fs = File.Create(path))
        {
            StreamWriter sw = new StreamWriter(fs);
            sw.AutoFlush = true;

            StringWriter tw = new StringWriter();

            tw.Write("Numeri\t\r");

            foreach (int i in elenco)
            {
                tw.Write(i + "\t");
                tw.Write("\t\r");
            }

            Response.Clear();
            Response.Buffer = true;

            Response.ContentType = "application/x-zip-compressed";
            Response.AppendHeader("Content-Disposition", "attachment; filename=ArchivioNumeri.zip");


            Response.Charset = "";
            this.EnableViewState = false;

            sw.WriteLine(tw.ToString());
            sw.Flush();
            sw.Close();
            sw.Dispose();

            System.Diagnostics.Process Proc = new System.Diagnostics.Process();
            Proc.EnableRaisingEvents = false;

            string pathProcesso = AppDomain.CurrentDomain.BaseDirectory;

            Proc.StartInfo.FileName= @pathProcesso + "\\ZipFile.bat";
            Proc.StartInfo.Arguments = "\"" + @pathProcesso + "\\pkzip25\" " + "\"" + path_2 + "\\ArchivioNumeri.zip\" \"" + path + "\""; 
            Proc.Start();

            Response.WriteFile(path_2+"\\ArchivioNumeri.zip");

            Response.Flush();

            File.Delete(path);
            File.Delete(path_2 + "\\ArchivioNumeri.zip");

            Response.End();
        }
}