Dependency Injection is not just a pattern…
It is the backbone of clean, testable ASP.NET Core applications. If you are working with ASP.NET Core, mastering Dependency Injection can completely change how you design, scale, and maintain your code. Here is why the official ASP.NET Core Dependency Injection resource is worth your time: 1️⃣ Built-in DI container
ASP.NET Core ships with a lightweight, performant DI container out of the box… no third-party setup needed. 2️⃣ Clear service lifetimes
Understand when to use transient, scoped, or singleton services and why it matters for performance and bugs.
3️⃣ Constructor injection done right
Learn how ASP.NET Core encourages clean dependencies without hidden coupling. 4️⃣ Testability by design
DI makes unit testing easier, faster, and far more reliable.
5️⃣ Real-world guidance
The docs focus on practical usage, not theory overload.
Now I’m curious…
Which of these is most valuable in your day-to-day work with ASP.NET Core? Or is there a DI challenge you keep running into that no tutorial seems to explain clearly?