If you understand Spring then Asp.net Core will feel right at home. I think .Net tends to be more explicit in the configuration, with DI being no exception. For instance, in Spring you can just annotate a service with @Service and the DI framework will pick that up. In Asp.net Core, you actually have to say IThing is backed by Thing as a singleton when running the application and TestThing when running tests.

Edit: Also as others have noted, constructor injection is the way to do DI.