Martin H Normark has written a post on how to use Windows Live ID Web Authentication – the post is an excellent tutorial:

In this blog post I'm going to cover how to authenticate users of an ASP.NET application against Windows Live, using the SDK for Windows Live ID. I'm going use the built-in ASP.NET Membership mechanism and go from there.

 

 

 

The one thing he didn’t mention is if you are using Windows Live ID for authentication, the primary goal should be authenticate people for Microsoft online services (as I mentioned in this Bangkok Post article) - if you implement Live ID Web Auth it gives you single-sign-on to other Windows Live Services such as the Messenger Library or Contact Control.

Check it out here

Another tidbit from Martin’s post is Scott Hanselman has a post on how to integrate Open ID into ASP.NET he says “The dotnetopenid source includes source for sample sites. It actually includes three samples, two WebForms and one ASP.NET MVC.“

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ps. with posts like these, Alex van Herwijnen (a Microsoft MVP) is still the guru of all things Windows Live ID