Everything You Need to Know About the Latest in C#

dotnet covers upcoming and recent C# language features, focusing on union types for modeling closed sets of shapes (common in wire protocols), plus a look at extension members and closed classes and how these features aim to make consuming code clearer and safer.

Overview

Union types in C#

• Union types are presented as a way to model closed sets of data shapes.
• The video frames unions as especially useful for scenarios like wire protocols, where a message can be one of a known set of shapes.
• The discussion emphasizes how unions can make intent explicit and help produce consuming code that is more confident and elegant.

Other C# features discussed

• Extension members: adding new members to existing types.
• Closed classes: a feature discussed as part of the broader set of recent and upcoming C# capabilities.

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