Hi everyone, i have to open a pdf file in a separate window. I have tried with this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <ext:ScriptManager ID="Sc1" runat="Server">
    </ext:ScriptManager>
    <ext:Button runat="server" ID="btnOk" Text="Ok">
        <AjaxEvents>
            <Click OnEvent="btnOk_Click" IsUpload="True">
            </Click>
        </AjaxEvents>
    </ext:Button>
    </form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void btnOk_Click(object sender, EventArgs e)
    {
        FileInfo file = new FileInfo(@"C:\Documents and Settings\koti\Local Settings\Temp\test.pdf");
        // Checking if file exists
        if (file.Exists)
        {
            Response.ClearContent();
            Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
            Response.AddHeader("Content-Length", file.Length.ToString());
            Response.ContentType = "application/pdf";
            Response.TransmitFile(file.FullName);
            Response.End();
        }
    }
}
but it opens the pdf file in the same and current window.

Anyone of you know how it's possible to reproduce my wished behaviour?

Thank you.