C#

What's new: https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-8

Design patters: https://github.com/anupavanm/csharp-design-patterns-for-humans/blob/master/README.md

Standards and practices: https://blog.submain.com/coding-standards-c-developers-need/

Try out Nullable Reference Types: https://devblogs.microsoft.com/dotnet/try-out-nullable-reference-types/