Weekly Microsoft Developer News: .NET 11 RC2, Native Python on Windows on Arm, and Foundry Browser Automation

A weekly roundup of Microsoft developer news, covering the latest releases and updates that matter for building and shipping applications. This edition focuses on .NET 11 RC2, Python on Windows on Arm, browser automation in Microsoft Foundry, and new Azure capabilities.

■ .NET 11 RC2
- First build in the release cycle with a go-live support license for production use
- Spans runtime, SDK, libraries, MSBuild, NuGet, F#, ASP.NET Core, .NET MAUI, and Windows Forms
- Supported by Visual Studio 2026 Insiders and Visual Studio Code with C# Dev Kit
- How teams can validate compatibility, performance, deployment pipelines, and breaking changes before the stable release

■ Python on Windows on Arm
- Python 3.15 selects the native arm64 runtime by default as a tier-2 CPython platform
- Coverage of PyPI project wheel availability and common workflows such as NumPy, Django, FastAPI, Jupyter, and Pytest
- Role of native CI runners for package maintainers

■ Microsoft Foundry and Azure
- General availability of browser automation using managed Playwright workspaces
- Features including toolbox integration, isolated sessions, live view, human takeover, tracing, and Entra ID / Azure RBAC support
- New Azure tools for operations, offline apps, and hardware-rooted security

Aimed at developers and engineering teams working with the Microsoft stack, this roundup helps you decide which updates to plan for and what to validate in your own projects. Watching lets you quickly grasp what changed, what is now supported for production, and which areas to explore further in the official announcements.