Writing a gadget i C#.NET

I've tried to find a tutorial for this for quite a while, but all sites, including the Gadget SDK, links to this page: http://ajax.asp.net/docs/Walkthroughs/DevScenarios/gadget.aspx

That page cannot be found. Is it moved somewhere else, or is it old and not supported anymore?

Here are a few links I found:

Building a Simple Gadget for Live.com

Microsoft Gadgets site