The ASP.NET team published a nice article on What's New in ASP.NET 4.5 and Visual Studio 2012. There you'll learn that:
- There are changes to the ASP.NET request validation, it now supports deferred (lazy) validation, as well as giving the option to fetch data unvalidated.
- The AntiXSS library is included in the framework.
However, there's no mention of two other important changes:
- There are significant Cryptographic Improvements in ASP.NET 4.5. Read it! This is important stuff!
- Windows Identity Foundation is now included in the framework, referred to as WIF 4.5.
To take advantage of these new bits you'll have to do a bit of configuration, we'll get into that right away.