How to resolve dependencies in controllers, razor pages, middleware

Short answer: Controllers: Constructor injection Razor Pages: Constructor injection in PageModel Middleware: Inject via constructor or use IApplicationBuilder.ApplicationServices

Real-world example (ShopNest)

ShopNest pipeline order matters: exception handling → HTTPS → auth → authorization → endpoints. Auth must run before protected APIs.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.