Is there something that makes this code work differently in DNN and instead of downloading the file, download the list of all folders and other stuff along with the content of the file?

    Dim FileName As String = "file.xlsx"
    Dim DirPath As String = PortalSettings.HomeDirectoryMapPath & "FileDir"
    Dim Path As String = DirPath & "\" & FileName
    Dim MyFile As FileInfo = New FileInfo(Path)

    HttpContext.Current.Response.ContentType = "application/octet-stream"
    HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" & MyFile.Name)
    HttpContext.Current.Response.Clear()
    HttpContext.Current.Response.WriteFile(Path)

And if I add

    Response.AddHeader("Content-Length", NewFile.Length.ToString())

then it's throwing an error that it can't find the file, though I can see it at the path it's saying it can't find...

Thanks,

Val