Microsoft officially launched .NET 11 during the .NET Conf 2026 online event held on November 10. The update focuses on improving runtime performance, development efficiency, and AI application integration across web, mobile, and desktop platforms.
The new version introduces hundreds of optimizations to the runtime and base libraries. Developers can now benefit from native compilation for command-line entry points and persistent build services, which reduce the overhead caused by frequent tool restarts.
AI capabilities are enhanced through a built-in MCP server template in the .NET 11 SDK, enabling easier integration with AI tool ecosystems. The release also includes support for model connectivity, agent frameworks, and experimental AI interface components for Blazor.
C# 15 introduces union types, allowing developers to explicitly define various operation outcomes with compiler-enforced handling. Additionally, .NET MAUI now defaults to the CoreCLR runtime, while Windows Forms receives updated visual styles.
As a standard support release, .NET 11 will receive updates for two years, while .NET 10 remains the long-term support option. Microsoft advises developers to verify compatibility, dependencies, and hardware requirements before upgrading.
