This chapter explored advanced messaging techniques that allow you to really take control of what happens during message handler execution. We started by learning how to create message assemblies without a dependency on NServiceBus itself, which grants us the ultimate freedom to perform updates to different components in our system independently.

After that, we learned some details about the messaging pipeline, including how we can take advantage of polymorphic dispatch to version our messages, how we can control the order of message handlers in the pipeline, and actions we can take on the messages when they are in the pipeline.

Lastly, we learned how to encrypt message properties, transport large payloads over the data bus, and how we can expose the processing of a command as a WCF service as an option to interact with remote client code that may be on a different platform.

Until now, we have been dealing with fairly simple messaging examples where a message comes in, is processed...