The RC version of ASP.NET MVC 4 was released some weeks ago with a lot of new features which you can read at its homepage http://www.asp.net/mvc/mvc4. One of the most interesting one is ASP.NET Web API which provides an interface to make a RESTful web service and can be accessed from any devices like computer, smart phone, tables… through HTTP protocol. REST (Representational State Transfer) has emerged over the past few year as a predominant design model for web service thanks to its simpler style in comparison to SOAP or WSDL. For example, my colleague has always complained about our SOAP web service when he consumes it on Android platform with plenty of XML parsing and DOM manipulation.