NServiceBus
NServiceBus is a commercial, open-source .NET framework for building distributed systems using message-based communication and the publish-subscribe pattern. It provides abstractions for messaging, handling failures, and managing long-running processes, enabling developers to create scalable and reliable applications. It is commonly used in enterprise environments for implementing service-oriented architectures (SOA) and microservices.
Developers should learn NServiceBus when building complex, distributed .NET applications that require reliable messaging, fault tolerance, and decoupled communication between services. It is particularly useful in scenarios like e-commerce order processing, financial transaction systems, or any domain where message durability and guaranteed delivery are critical. Use it to simplify the implementation of sagas (long-running workflows), retry policies, and error handling in asynchronous systems.