Union Types are Finally in .NET, but who cares?

Name: Union Types are Finally in .NET, but who cares?
Uploaded: 2026-11-03T12:40:14+00:00
Description: Nick Chapsas introduces union types in C# 15, also called discriminated unions, and demonstrates how they work. He explains the problem this language...

Today by Nick Chapsas

Nick Chapsas demonstrates the C# 15 union types feature and discusses how to help AI coding agents use it.

Union types in C# 15

The video introduces union types, also referred to as discriminated unions, and showcases how the feature works. Chapsas explains the problem it addresses and considers its practical value for C# developers.

Helping coding agents use the feature

Chapsas also covers how to provide AI coding agents with the information they need to use union types. The accompanying C# 15 skill download is available through Dometrain.