What’s new in C# 12 and beyond
summary
Preview of C# 12 shows concrete changes: primary constructors land for all classes/structs (parameters are real constructor params and can be captured), type aliases accept more syntactic forms, and collection literals plus a spread operator match new list patterns so literals construct target-typed collections. Demo compiles in Roslyn/VS; some features remain experimental (natural type for literals, field backing access in auto-properties) due to breaking-change concerns. Roadmap includes extension types (explicit/implicit overlays) and performance-first codegen.
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chapters (8)
- 0:00Welcome
- 5:25C# 11 improvements
- 9:36Primary constructors
- 17:24Collection literals
- 27:31Future plans
- 31:23Field access in auto properties
- 36:41Extension types
- 44:13Closing
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