Discriminated Unions Are Finally in .NET But

Name: Discriminated Unions Are Finally in .NET But
Uploaded: 2026-04-21T19:23:04+00:00
Description: Nick Chapsas introduces discriminated unions (union types) coming in preview for C# 15 and .NET 11, focusing on what the feature enables and the practical...

6 days ago by Nick Chapsas

Nick Chapsas walks through discriminated unions (union types) in C# 15 and .NET 11, now merged in preview, and highlights the trade-offs and “gotchas” to keep in mind.

Full summary based on transcript

What the video is about

Nick Chapsas showcases discriminated unions in C# 15 and .NET 11 after the feature was merged in preview.

Discriminated unions in C#/.NET (preview)

The video focuses on the new union/discriminated union capability being introduced to the language/runtime.
Nick frames it as a long-awaited feature, but with important caveats (the “but” in the title).

Notes and links mentioned

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GitHub: https://github.com/Elfocrash
Twitter/X: https://twitter.com/nickchapsas
LinkedIn: https://www.linkedin.com/in/nick-chapsas