On Facebook/Twitter/Windows Line authentication in ASP.NET 4.5

Nowadays, when building public web sites with ASP.NET, the question of authentication methods is usually this: should we build our own authentication, or use something like Facebook, Twitter, or Windows Live?

In the current ASP.NET versions (up to version 4.0 that is), it is easier to build your custom authentication scheme, unless or wander around the Internet and look for ready-made libraries (like this one) and integrate them with your code.

The good news for ASP.NET developers is that in the next version of ASP.NET 4.5, OAuth and OpenID based systems are built in. If you take a look at this white paper under the section "Enhanced Membership and Authentication", you can quickly see that implementing for instance Facebook authentication isn't rocket science anymore.

Sounds like a plan to me.