What are the different service lifetimes in ASP.NET Core?

What are the different service lifetimes in ASP.NET Core?

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.

Can you explain when to use each type?

Sure! Use Transient for lightweight, stateless services. Scoped is ideal for services that need to maintain state within a single request. Singleton is best for shared resources that should be reused across the application.

What happens if I use a Scoped service in a Singleton?

Using a Scoped service in a Singleton can lead to issues, as the Singleton will hold a reference to the Scoped service beyond its intended lifetime, potentially causing memory leaks or unexpected behavior.

How do I register these services in the Startup class?

You can register services in the ConfigureServices method of the Startup class using services.AddTransient<T>(), services.AddScoped<T>(), or services.AddSingleton<T>() depending on the desired lifetime.