Long-running cloud workflows can look intimidating—especially when retries, failures, replay, external events, and human approvals enter the picture. This book makes them understandable, practical, and manageable.
Azure Durable Functions with .NET 10 is a step-by-step guide to building reliable, stateful, long-running serverless workflows with C# and the modern .NET isolated worker model. You do not need previous experience with Azure Durable Functions, workflow engines, deterministic replay, sagas, or distributed orchestration. Basic familiarity with C# is helpful, and every Durable Functions concept is introduced progressively before it is used in larger implementations.
Rather than overwhelming you with isolated examples, the book guides you through FulfilmentFlow, a realistic order-fulfilment and exception-management application that grows chapter by chapter. You will learn by building, testing, troubleshooting, and improving a complete workflow system.
Mistakes are treated as part of the learning process. Each successful orchestration, recovered failure, correctly handled timeout, and completed workflow becomes another practical win that strengthens your confidence.
Key FeaturesStep-by-step, implementation-focused explanations
Practical C# and .NET 10 examples using Azure Functions
One cumulative real-world project instead of disconnected demos
Clear coverage of orchestrators, activities, replay, and determinism
Durable timers, external events, human approvals, and workflow state
Production-focused reliability, security, testing, observability, and deployment
Verification checklists, review questions, exercises, and troubleshooting guidance
What You Will LearnBuild long-running and stateful serverless workflows
Design orchestrators and activity functions correctly
Understand durable execution, event history, replay, and deterministic code
Create sequential, parallel, fan-out/fan-in, and sub-orchestration workflows
Use durable timers, external events, reminders, approvals, and escalation
Manage workflow instances and Durable Entities
Apply retries, idempotency, compensation, and saga-style recovery
Control concurrency, scaling, payload size, security, and task-hub isolation
Test, monitor, trace, troubleshoot, version, and deploy production workflows
Use Durable Task Scheduler, managed identity, Bicep, and CI/CD effectively
Who This Book Is ForThis book is ideal for C# and .NET developers who want to learn Azure Durable Functions from the ground up and progress toward production-ready workflow engineering. It is especially useful for developers building business processes that must survive delays, failures, restarts, retries, external callbacks, and human decisions. Prior Durable Functions experience is not required.
Table of ContentsDurable Execution with Azure Functions and .NET 10
Orchestrators, Activities, Replay, and Determinism
Building Reliable Sequential Workflows
Parallel Workflows and Orchestration Decomposition
Durable Waiting, External Events, and Human Interaction
Workflow State and Instance Lifecycle Management
Failure Handling, Retries, Idempotency, and Compensation
Scaling, Performance, Data, and Security
Testing, Observability, and Troubleshooting
Workflow Versioning, Deployment, and Production Operations
If you are ready to move from fragile background processes to reliable, production-ready workflow orchestration, start building with Azure Durable Functions, C#, and .NET 10 today.
