Many WCF developers start and end with the Request/Response Message Exchange Pattern.  In actuality, there is a wide variety of Message Exchange Patterns cataloged by Hohpe and Woolfe in books like “Enterprise Integration Patterns” and Pattern & Practices “Integration Patterns.” In this advanced talk, that starts where most WCF talks leave off, we will show you how to build more loosely-coupled services and systems via these MEPs and with WCF. We will then focus on the powerful List-Based Publish/Subscribe Design Pattern. Upon showing how many lines of WCF code are required to implement the pattern in WCF, we will show the pattern as the basis for the Neuron ESB and achieve the same results with zero code. We will then focus on Mediation and how ESBs help mediate between disparate services.