Unable to see the redirected page name in the address bar

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.NET3.5

ASP.NET

.NET

redirection

I have a page which has a LinkButton,my requirement is when i click on 'DownLoad; Linkbutton the page should redirect to another page and there my file should be download and my web page address bar should display that which page it is redirecting also my querystring value. please suggest me how would I do that please help me.

here is my code

FirstPage.aspx :

protected void LinkButton1_Click(object sender, EventArgs e) {

    Response.Redirect("Default2.aspx?filename=Csharp/CSharp.txt");              
}

Download.aspx :

protected void Page_Load(object sender, EventArgs e) 
{
    string filename = Request.QueryString["filename"];
    Response.ContentType = "text";
    Response.AppendHeader("Content-Disposition", "attachment; filename=CSharp.txt");
    Response.TransmitFile(Server.MapPath(filename));
    Response.End(); 
}

I used this code in each and every event of Download.aspx page event but i couldn't.
note:I have this requirement exactly that i have to use querystring and also the redirected page and querystring value should show in the address bar before download.