Where should the container be in initialized in ASP.NET Core? about documentation HOT 3 CLOSED

The Simple Injector container is not the .NET Core built-in container and different advice applies here.

During the ConfigureServices phase, registrations are made into the built-in configuration system (the built-in container), and during this time you can as well make the registrations for Simple Injector. During this time however, the built-in configuration system is built and framework services can't be resolved yet from the system. It's only during the Configure phase that services can be resolved from the ASP.NET configuration system.

Resolving types from the built-in configuration system is often needed, because your application needs to interact with framework supplied components. This will typically mean that you create adapters for application-specific abstractions and the adapter will internally callback into framework components. Since those framework components can only be resolved during the Configure phase, it's not possible to register those adapters into Simple Injector before the Configure phase.

So yes, you can move most of your registrations to ConfigureServices. Where to place them is completely up to you, but you will at least have your adapter registrations in the Configure phase.

from documentation.

This question is better suited on https://github.com/simpleinjector/SimpleInjector/issues/ instead.

from documentation.

@dotnetjunkie, Thank you very much!

from documentation.