Nancy is a lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono. The goal of the framework is to stay out of the way as much as possible and provide a super-duper-happy-path to all interactions. Find more about it at nancyfx.org.
This Slide deck (in English) used at the DWX Conference in Nürnberg in July 2013 and provides you with an overview of the basic elements of the framework. The presentation material as well as the demo code can be found on github at https://github.com/Timothep/Talk.NancyFx