Property encryption is one of my favorite NServiceBus features in that it provides a pattern for implementing message encryption as well as providing a concrete basis for addressing the concerns of compliance and security teams. Additionally, once your endpoint conventions are configured, it is easy to live with since it gets implemented only where necessary and in a consistent way.

One of the foundational features of NServiceBus is the support of multiple queuing technologies known in NServiceBus parlance as a Transport. NServiceBus transports encapsulate the logic required to connect to their respective queue technologies to produce and consume messages.

Testing is one of the more challenging aspects of message based systems and is probably one of the top reasons it is common to see http endpoints instead of messaging in microservices.

There are a number of subtle but important aspects of message based systems that are not apparent until after you have started building one and running it in production. One of those aspects is message headers. NServiceBus message headers contain metadata about each message that will help you correlate, route and trace the history of a message in your system.

Message retries are one of the most powerful patterns in message based systems. Retries are probably one of the more compelling reasons to use a message based architecture and make a system that uses them significantly more durable and accurate.