So WCF offers many new features like : Simplifying the configuration model – you can run without svc or config file. (new tags included like serviceActivation) Windows server Appfabric (formerly “Dublin”) Monitoring WCF with AppFabric. Turning on ETW (Event tracing for windows) providing a lot of information on traces we output. Associating that with the relevant monitoring program Can be configured from IIS in the monitoring section (Health monitoring, end-to-end Monitoring and so on…) Call History...