C# 9

I previously wrote on how static members on a struct work as a more extension-friendly enum. This pattern has gotten even better as of C# 9.

I previously wrote on the difficulties of Aspect-Orientation in C#. The addition of Source Generators in C# 9 changes the possibilities considerably.

I previously wrote on the difficulties of normalized result types in C#. Let me be clear, result types are still not great in C#, but C# 9 at least makes them practical.

I previously wrote on the difficulties of abstracting ID types in C#. Good news, C# 9 record types greatly simplify this design decision.