idg10.bsky.social

C# 12.0: ref readonly | endjin C# 12.0 adds a new way to annotate parameters: ref readonly. This seems like it should mean exactly the same as the older in annotation. This post explains why this new syntax is useful.

So why exactly did C# 12.0 add a language feature that looks a lot like a thing we could already do?

endjin.com/blog/2025/04...