What is the lifecycle of services in ASP.NET Core's dependency injection?

What is the lifecycle of services in ASP.NET Core's dependency injection?

In ASP.NET Core, services can have three lifecycles: Transient, Scoped, and Singleton. Transient services are created each time they are requested. Scoped services are created once per request, while Singleton services are created once and shared throughout the application's lifetime.

Can you explain the differences between these lifecycles?

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

When should I use Scoped over Transient?

Use Scoped when you need to maintain state during a single request, such as database contexts. Transient is better for stateless services that don't require shared state.

What happens if I use a Singleton service that depends on a Scoped service?

If a Singleton service depends on a Scoped service, it can lead to issues because the Scoped service will be disposed of at the end of the request, while the Singleton will remain alive. This can cause runtime errors.