In this chapter, we explored the new features in ASP.NET 4.5. We also explored the ASP.NET Web API and implemented an ASP.NET MVC 4 application that uses the ASP.NET Web API framework. We explored the ASP.NET Web API with special focus on how routing and security is handled in the ASP.NET Web API. In the next chapter, we will discuss how we can consume WCF RIA and RESTful Services using Silverlight.