Event-Driven .NET 10 with MassTransit

Building reliable event-driven applications can feel intimidating. Queues, retries, duplicate messages, sagas, outboxes, brokers, and distributed failures can quickly turn a simple .NET project into something difficult to reason about.

Event-Driven .NET 10 with MassTransit makes that complexity manageable.

Written for developers who are new to MassTransit and distributed messaging, this practical guide takes you from your first message flow to a production-oriented event-driven system using .NET 10, C#, RabbitMQ, PostgreSQL, and Azure Service Bus. You do not need previous experience with MassTransit, RabbitMQ, Azure Service Bus, sagas, or transactional messaging; basic familiarity with C# and .NET application development is enough to begin.

Instead of overwhelming you with advanced concepts at once, the book builds one Order Fulfilment and Delivery Platform step by step. You will see failures happen, understand why they happen, and then apply the right mechanism to solve them. Mistakes become part of the learning process, while each working message, recovered failure, passing test, and completed workflow becomes a practical milestone.

• Beginner-friendly introduction to event-driven architecture and distributed messaging
• Hands-on examples with .NET 10, MassTransit, RabbitMQ, PostgreSQL, and Azure Service Bus
• Practical coverage of retries, delayed redelivery, faults, error queues, and idempotency
• Transactional messaging with Bus Outbox, Consumer Outbox, and inbox patterns
• Saga state machines, compensation, scheduling, concurrency, and long-running workflows
• Testing with the MassTransit Test Harness and real RabbitMQ integration
• Production-focused observability, OpenTelemetry, troubleshooting, CI/CD, and deployment guidance

• Design durable message contracts and choose between commands and events
• Use send, publish, endpoints, correlation, and RabbitMQ topology correctly
• Build consumers that handle failures and duplicate delivery safely
• Solve database-and-message dual-write problems with transactional outbox patterns
• Coordinate distributed workflows with sagas, timeouts, and compensation
• Test consumers, routing, sagas, and transactional behavior
• Trace, monitor, troubleshoot, and operate event-driven .NET systems
• Adapt a RabbitMQ-based application to Azure Service Bus

This book is for C# and .NET developers who want a clear, practical path into event-driven architecture, MassTransit, message-based systems, RabbitMQ, Azure Service Bus, and reliable distributed workflows. It is especially suitable for readers who understand basic .NET development but are new to distributed messaging.

Chapter 1: Building the Foundation for Event-Driven .NET
Chapter 2: Designing Message Contracts and Routing
Chapter 3: Building Consumers and Handling Failures
Chapter 4: Transactional Messaging with the Outbox
Chapter 5: Scheduling and Controlling Message Processing
Chapter 6: Coordinating Workflows with Saga State Machines
Chapter 7: Compensation and Reliable Distributed Workflows
Chapter 8: Testing Event-Driven .NET Applications
Chapter 9: Observability, Operations, and Troubleshooting
Chapter 10: Azure Service Bus and Production Delivery Event-Driven_NET_10_with_MassTr...

If you are ready to move beyond simple publish-and-consume demos and understand how reliable event-driven .NET systems are actually built, this book gives you a structured, practical path forward.

Start building one message, one workflow, and one successful recovery at a time.