This both adds the new "// <auto-generated/>" header, as well as restores the non-file-scoped namespace declaration so that the code will compile on C# < 10 as well (which is explicitly supported by the MVVM Toolkit)
In particular:
- Use explicit types everywhere to improve clarity
- Use target-typed new() expression when target is explicit
- Use explicit discard for value-returning statements
Sergio Pedri