CQRS and MediatR in .NET Projects

CQRS is a powerful pattern that helps developers decouple the responsibilities of reading and writing data within an application. Combined with the popular MediatR library, it promotes clean code, enforces single responsibility principles, and removes unnecessary dependencies between components. This book will show you how to implement CQRS in real-world .NET applications-step by step-with a strong emphasis on clean architecture, best practices, and scalable software design.
From understanding the core concepts of CQRS to building full-featured .NET applications using commands, queries, MediatR pipelines, and dependency injection, this book walks you through every layer of implementation. You'll learn how to keep your controllers lean, encapsulate business logic in handlers, and ensure high test coverage with easy-to-mock classes and interfaces.
Key topics covered:The fundamentals of CQRS and the motivation behind separating read and write operationshow MediatR simplifies the interaction between controllers and application logicBuilding and organizing clean architecture projects that naturally support CQRSCreating Command and Query handlers, integrating validation, and writing testable componentsImplementing MediatR pipeline behaviors for cross-cutting concerns like logging, validation, and cachingIntegrating CQRS with Entity Framework Core for optimal performance and consistencyUsing CQRS in ASP.NET Core Web APIs with dependency injection and controller refactoringWriting comprehensive unit and integration tests for commands, queries, and pipelinesHandling advanced use cases like domain events, event-driven architecture, and microservicesThis book is packed with practical examples, best practices, and real-world guidance you can apply immediately to new or existing .NET projects. You'll explore advanced topics like custom pipeline behaviors, query projection, repository patterns, and how to keep your application architecture clean and modular.
Who is this book for?.NET developers building complex or enterprise-grade applicationsBackend engineers who want to improve application structure and maintainabilityArchitects and tech leads implementing clean architecture or microservicesDevelopers learning MediatR and seeking real-world examples beyond basic tutorialsProfessionals preparing for technical interviews and needing architectural knowledgeWith CQRS and MediatR, you can transform your .NET projects into scalable, testable, and maintainable systems that are easy to extend and refactor. This book provides not only the technical skills to implement the pattern but also the reasoning behind every architectural decision.
If you're looking to master CQRS with MediatR and elevate your application architecture, this is the comprehensive guide you've been searching for.

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