.NET 11 Preview 1 Is Live With Runtime Tweaks, C# Updates & MAUI Improvements

Microsoft has officially kicked off the next chapter of its developer platform with the release of .NET 11 Preview 1, offering developers an early look at what’s coming later this year. The upcoming version will come as a Standard Term Support (STS) release. In other words, it’ll receive two years of support once it hits stable form in November.

.NET 11 Preview 1 is now available

At the runtime level, Microsoft is introducing a new async mechanism designed to improve configuration, diagnostics, and Ahead-of-Time (AOT) support. WebAssembly also gets attention, with CoreCLR support landing in the WebAssembly SDK alongside enhanced browser-host capabilities like threading, timers, and interop.

Interpreter coverage has been expanded, too, with deeper integration around async workflows, ReJIT, and debugging as well as performance improvements. Meanwhile, the .NET SDK gets improvement, including command-line enhancements and new built-in code analyzers aimed at improving code quality and developer productivity.

On the language side, C# gets support for collection expression arguments and extended layout functionality. Meanwhile, F# now enables parallel compilation by default, a change that promises faster build times, along with improved performance for computation expression-heavy code and a handful of smaller language tweaks.

Cross-platform developers working with .NET MAUI will notice that XAML source generation is now enabled by default, which should speed up build times and improve runtime and debugging performance. CoreCLR also becomes the default runtime on Android, hinting at Microsoft’s continued push toward modernizing its mobile tooling.

For desktop developers, WPF receives fixes related to Fluent window backdrops and background rendering on Windows 10. .NET 11 Preview 1 is available now through Microsoft’s official .NET channels. Developers are advised to pair it with the latest Visual Studio Insiders build or use Visual Studio Code with the C# Dev Kit extension for the best experience. With the first preview now live, the road to .NET 11’s full release is officially underway.