Applying SOLID in .NET Core

SOLID principles guide class and component design in .NET Core architectures.

Key principles:

1. Single Responsibility — each class has one reason to change.

2. Open/Closed — open for extension, closed for modification.

3. Liskov Substitution — derived types must be substitutable for base types.

4. Interface Segregation — many small interfaces over large ones.

5. Dependency Inversion — depend on abstractions, not concretions.

Architecture impact: SOLID reduces coupling, improves testability, and supports Clean Architecture boundaries.

Reference:

Microsoft: Principles of Software Architecture

https://martinfowler.com/ieeeSoftware/failFast.pdf