Clean Architecture: A Layered Approach for Scalable ASP.NET Core Apps

Clean Architecture is a software design pattern that organizes ASP.NET Core applications into independent layers, each with a single responsibility. The four core layers — Domain, Application, Infrastructure, and API — separate business logic from frameworks like Entity Framework Core and ASP.NET Core. This separation ensures that dependencies always point inward toward the core, preventing tightly coupled code that breaks when modified. The approach makes it easier to replace databases, add features, write unit tests, and improve code readability over time. Developers are advised to keep business logic out of controllers, use interfaces for external dependencies, and rely on dependency injection throughout the application.