Understanding Microservices with .NET

Microservices let teams ship faster and scale independently, but they add complexity in design, data, and operations. This book shows how to build cloud-ready services with modern .NET and ASP.NET Core using containers and Kubernetes grounded in real patterns and trade-offs for developers, architects, and DevOps engineers.

The book begins by establishing the core principles of microservices, detailing when and how to apply powerful design patterns like domain-driven design (DDD), Saga, CQRS, and Circuit Breaker for resilience. You will move on to hands-on development, building a full e-commerce application with services for Catalog, Basket, and Ordering, and implementing asynchronous communication using MassTransit and RabbitMQ for reliable transactions. The book then transitions to essential operational maturity, covering centralized security with IdentityServer4, testing, containerization with Docker, building strong CI/CD pipelines, and advanced deployment to Kubernetes using Helm and Terraform (GitOps). The final section ensures your services run flawlessly by teaching you scaling (HPA/VPA), deep observability with Prometheus, and future trends like agentic AI microservices.

By the end, you will model bounded contexts, choose the right sync/async protocols, apply resiliency patterns, secure and version APIs, automate delivery, run on Kubernetes, and instrument your system—confidently shipping scalable, reliable .NET microservices.

WHAT YOU WILL LEARN
● Build fast .NET Web APIs and gRPC endpoints.
● Add resiliency with retries, circuit breakers, and timeouts.
● Secure microservices using OAuth2, OIDC, and JWT tokens.
● Automate CI/CD, GitOps, and blue-green Kubernetes releases safely.
● Design robust microservices using DDD, Saga, CQRS, and MassTransit/RabbitMQ patterns.
● Achieve deep observability using OpenTelemetry, Prometheus/Grafana, and ELK stack.

WHO THIS BOOK IS FOR
This book is for .NET developers, backend engineers, solution architects, DevOps/SREs, and technical leads who are new to microservices or modernizing monoliths. It suits beginner-to-mid-level practitioners and senior engineers seeking a pragmatic, end-to-end playbook for designing, building, securing, deploying, and operating cloud-native services on .NET.