What is an example of a really good codebase written in modern C#?
There are quite a few appealing things about the language, but I'm having trouble shaking the feeling that it's kind of like Java. I know both languages have evolved a lot, but some codebases might get stuck in some old patterns.
I would point to https://github.com/dotnet/roslyn itself as an example of a modern codebase. We try to adopt and use all of the new language features there as we write them to try and determine if the ergonomics are good.