Nils Andresen

Cause of the problem: When the `FakeFileSystem` is created, it creates a `FakeFileSystemTree` using the given `ICakeEnvironment`: https://github.com/cake-build/cake/blob/06e82a78bb8bfa978bcf838100caf69f1157cbdd/src/Cake.Testing/FakeFileSystem.cs#L23 The `FakeFileSystemTree` checks whether `environment.WorkingDirectory.IsRelative` is true and if so, it throws...

@rcdailey this will force all users to use the "Microsoft DI" and restrict everyone else who likes to use some other DI container, right?

Yes. Carefully reading #1743, we specifically decided against deleting so we have things documented for older versions, too. I see two ways forward from here: 1) we add a new...