Union Types

I’ve been learning Scala lately, and it turns out that scala union types are sometimes implemented the same way I discovered unions could be imitated in C#.

I previously wrote about result types and union types in C#. I got to wondering if a union-based approach would allow nicer result types. In short, it works, but not as nicely as I’d hope.

Union types are common in functional languages, but have yet to make it to C# and similar. These types solve a simple and very common problem, data that is one of a finite set of possibilities. Here’s we’ll look at how to accomplish the same in C#.