Service lifetimes transient vs scoped vs singleton [closed]

Question

I found an article on

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-2.1

and it explains a asp.net core DI and service lifetime.

Article mentions following lifetimes:

• transient
• scoped
• singleton

I am trying to find a real world example or at least a better explanation on when to use each lifetime.

Answer 1

3 examples:

Singletons - These may exist for the entire application wide configuration setting, for example a game manager that keeps track of players progress throughout the game.

Scoped - entity framework contexts are recommended to be scoped so that you can reuse the connection properties.

Transient - entity framework contexts can not be shared by 2 threads, so if you wanted to do any asynchronous work. You would use a transient so that a new instance of the context is created for every component. Otherwise you would have to wait for the scoped component to finish before it moves onto the next.