Microsoft has announced the release of .NET 11 Release Candidate 1, which is now available for production use and features C# 15 as the default language version. This version includes significant improvements such as in-process crash reporting for Unix systems, hardware FP16 instructions for enhanced performance, and new mobile app testing capabilities. Additional updates in the SDK facilitate reproducible container publishing and caching for Native AOT single-file programs. Microsoft emphasizes stability over new features for this release, encouraging developers to utilize Visual Studio 2026 Insiders or VS Code for their projects

Microsoft Ships .NET 11 RC1 With Production Go-Live and C# 15

Microsoft has officially released .NET 11 Release Candidate 1, unlocking production go-live status for developers eager to deploy the upcoming LTS branch. C# 15 is now the default language version, finalizing union types, closed class hierarchies, and async support within unsafe contexts. The runtime ships with in-process crash reporting for Unix systems and leverages hardware FP16 instructions for faster System.Half calculations. Alongside these core updates, the SDK introduces mobile app testing via dotnet test, reproducible container publishing, and Native AOT caching for single-file programs.

Microsoft Ships .NET 11 RC1 With Production Go-Live and C# 15 @ NT Compatible