In this post I look at the C#14 extension members feature. I show how to convert extension methods to the new syntax and how to add new types of extension.

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.NET Escapades

C# 14 introduces extension members, expanding beyond traditional extension methods to support static extension methods, static and instance extension properties, and extension operators. The new syntax uses extension blocks with receiver parameters, allowing developers to add static methods directly to types and create extension properties. While the syntax requires more nesting and may appear unfamiliar, it provides better alignment between how extensions are defined and used, with all existing extension methods remaining compatible.

C# 14 extension members; AKA extension everything

Extension members and extension everything

A case study: NetEscapades.EnumGenerators