How Can Clean Architecture Be Applied to Large ASP.NET Core Applications?

As an ASP.NET Core application grows, putting controllers, business rules, database logic, and integrations together can make the code difficult to test and maintain. Clean Architecture helps separate business rules from infrastructure and delivery mechanisms through clearly defined boundaries and dependencies. This discussion explores how to structure large ASP.NET Core applications using layers, dependency inversion, interfaces, dependency injection, and testable business logic. It also examines when Clean Architecture adds genuine value and when it can introduce unnecessary complexity.