Wouldnt it be great to extend your application by just dropping in a DLL? Plug-in architectures make it possible and there are a few techniques that make it easy. This talk starts with a quick refresher on dependency injection and then builds onto that foundation to create a plug-in architecture. Diving deep into the code of a sample MVC application, you will see various plug-in strategies, explore the frameworks that take care of the heavy lifting, and understand where and how the plug-in points should be implemented.