Clean Architecture in .NET

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Build once. Scale forever. Maintain with ease.

  • Over the past few months, I’ve been working on enterprise-grade applications using Clean Architecture in .NET Core. The results have been nothing short of amazing
  • Better scalability
  • Modular and testable code
  • Faster development cycles

Here’s the structure I follow to keep things clean, decoupled, and easy to maintain

API Layer (Presentation)

  • Handles HTTP requests via Controllers
  • Sends Commands and Queries to the Application Layer
  • Configures Dependency Injection in Program.cs

Application Layer

  • Contains pure business logic
  • Uses CQRS with MediatR
  • Manages DTOs, Mappings, Events, and Custom Exceptions

Domain Layer (Core)

  • Holds core business rules and models
  • Includes Entities, Interfaces, and Domain Services
  • No EF Core, no HTTP, no UI logic

Infrastructure Layer

  • Manages persistence, file system, email, and external APIs
  • Implements interfaces from the Domain Layer
  • Injected into Application Layer through DI

Why it works

  • This structure helps you build scalable, maintainable, and testable applications. Perfect for microservices, enterprise systems, and clean code lovers

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