How does dependency injection work in ASP.NET Core?

How does dependency injection work in ASP.NET Core?

Dependency injection in ASP.NET Core allows you to manage the dependencies of your classes through a built-in IoC (Inversion of Control) container. This promotes loose coupling and easier testing.

Can you explain the different types of lifetimes for services?

Sure! In ASP.NET Core, there are three main service lifetimes: Transient, Scoped, and Singleton. Transient services are created each time they are requested, Scoped services are created once per request, and Singleton services are created once and shared throughout the application's lifetime.

How do I register a service in the Startup class?

You can register a service in the ConfigureServices method of the Startup class using the services.AddTransient, services.AddScoped, or services.AddSingleton methods, depending on the desired lifetime.

What are some common pitfalls to avoid with dependency injection?

Common pitfalls include not understanding the service lifetimes, accidentally creating circular dependencies, and failing to register services properly, which can lead to runtime errors.