Everything you want to know about ASP.NET Web API content negotiation

One of the key concepts in ASP.NET Web API, lying pretty much at the heart of it, is content negotiation – or simply conneg. I really believe that, before you start developing Web API solutions, you need to understand conneg well. I thought it would be interesting to try to explain content negotiation in detail – what it is, what it does, and why it does that.