Since the WebAPI is usually invisible and doesn't have a real output-page it’s a bit harder to debug. What makes things even more difficult is the fact that DNN doesn't log WebAPI errors (it should, but that's a pending issue). So I'll show you the most important tools to help you get started.

WebApi is the most important part of ASP.net going forward. Since most of the web-magic of the future will take place in the browser (AngularJS, etc.) the server will focus on delivering application parts and data. This is where WebAPI comes in. In the first set of posts I'll talk about the basics of WebApi and I'll start with a simple example.