Microsoft ships .NET 11 with C# 15 union types and hundreds of performance improvements
unixterminal · x · 2026-11-11
Microsoft has released .NET 11, a Standard Term Support release backed by two years of support. Highlights:
- C15 adds union types
- Hundreds of runtime optimizations, faster SDK tooling, and lower overhead in everyday commands
- Improvements across ASP.NET Core, .NET MAUI, and Windows development
- Better AI-powered development tools and agentic capabilities for web, mobile, and desktop apps
.NET 10 remains a supported LTS option. The release coincides with .NET Conf 2026 (Nov 10-13).
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