juniorASP.NET
What is Dependency Injection in ASP.NET Core?
Updated Apr 28, 2026
Short answer
DI provides dependencies automatically to classes.
Deep explanation
ASP.NET Core has built-in DI container. Services are registered and injected into controllers or services.
Real-world example
Injecting database service into controller.
Common mistakes
- Wrong service lifetime usage.
Follow-up questions
- What is Scoped?
- Why DI?