Από Static Classes σε Services με Dependency Injection Με οπτική Clean Architecture (layers & boundaries)

The article explains why static classes become problematic in layered systems, as they create hidden dependencies that violate Clean Architecture boundaries—especially when domain layers directly depend on infrastructure. It demonstrates how replacing static classes with services and interfaces makes dependencies explicit, enabling proper separation across domain, application, and infrastructure layers. Practical examples contrast a static EmailHelper with an interface-based approach that respects architectural boundaries.