The tests in `Scenario` are intended as the introduction to Albedo, so should build on knowledge the user already has. For that reason, I prefer using (more or less) well-known types where possible.

One of my favorites is `System.Version` because it's in the `System` namespace in mscorlib. `System.Uri` is another good candidate. However, in this case it's more difficult because we need a type with a public instance field...

Was that the reason you picked `ClassWithFields` instead?