Dependency Injection Setup Across Layers
Program.cs is where service registration goes to rot. It starts at five lines, then every feature adds its repositories, validators, and settings bindings until nobody can tell which layer owns what. The Contact Management Application avoids that with one rule: each layer registers its own services through an extension method, and Program.cs only calls those methods. This post walks through that setup layer by layer, using the real code, including two spots where the real code deserves a warning label.
