Using Algebraic Data Types in .NET Framework / .NET — Designing States and Results with Types (archived 2026-07-27)

How to use algebraic data types — especially sum types and discriminated unions — in .NET Framework and .NET, and what you gain: F#, C# class hierarchies, records, OneOf, and the C# 15 union preview. Archived version of https://comcomponent.com/en/blog/2026/06/09/003-dotnet-algebraic-data-types/, as published on 2026-07-27. The live article is maintained and may change after this date. First published 2026-06-09.