My ASPX code looks like this

Dim ms As New MemoryStream
printDoc.Save(ms, False)
Dim byteArray As Byte() = ms.ToArray()
ms.Flush()
ms.Close()
With HttpContext.Current.Response
    .ClearContent()
    .Clear()
    .AddHeader("Content-Disposition", "attachment; filename=" & userData.eeTemplate & "s.pdf")
    .AddHeader("Content-Length", byteArray.Length.ToString())
    .ContentType = "application/octet-stream"
    .BinaryWrite(byteArray)
    .Redirect(mypage.aspx, False)
    .End()
End With

However, "MyPage.axpx" does not then show the download symbol at the top right. What am I doing wrong?