Dear Angelo,
That example integrates the following 3 examples, you can find the source code of all these 3 examples in download package:
Ajax-Uploader\Framework 2.0-Csharp\simple-upload.aspx
Ajax-Uploader\Framework 2.0-Csharp-MagicAjax\simple-upload.aspx
Ajax-Uploader\Framework 2.0-Csharp-MicrosoftAjax\simple-upload.aspx
Thank you for asking