ASP.NET Core’s built-in DI container: capabilities and limitations?

Short answer: ✅ Capabilities: Constructor injection Lifetime management (Transient, Scoped, Singleton) Supports IEnumerable<T>, IServiceProvider, and open generics ⚠ Limitations: No support for named registrations Limited property injection Basic feature set compared to Autofac or other 3rd-party containers

Real-world example (ShopNest)

ShopNest registers AppDbContext as Scoped and IMemoryCache as Singleton. Putting DbContext in a Singleton causes threading bugs.

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.