ASP.NET Web API–Http Messaging

ASP.NET MVC 4 (right now in Beta) has introduced the ASP.NET Web API , a MVC compliant framework for developing and hosting HTTP services which can be accessed from a variety of clients.In this post we will take how the ASP.NET Web API request processing pipeline works and HTTP request is passed between different processing stages. ASP.NET Web API can be hosted in IIS like a normal ASP.NET Web application and it can be also self hosted within a simple console application.For the sake of simplicity we will use a self hosted application here.