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99.99999% of the time (yes, I measured it), a controller in ASP.NET MVC is a type, and an action is a method — with reflection as the glue that holds it all together. For most folks, that’s the best way to view how ASP.NET MVC works. But some folks like to dig deeper and get their hands dirty a bit by taking a peek under the hood. Doing so reveals that while the reflection based mapping of controllers types and actions to methods is true by default, it can be easily changed to something else entirely. ASP.NET MVC contains powerful abstractions for the controllers and actions via the ControllerDescriptor and ActionDescriptor classes. These abstractions make it possible to implement completely different underlying implementations of a controller...
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