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Today we are excited to announce the release of TypeScript 5.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types. With types, TypeScript makes it possible to check your code to avoid bugs ahead of time. The TypeScript type-checker does all this, and is also the foundation of great tooling in your editor and elsewhere, making coding even e

Today we are excited to announce the availability of TypeScript 5.9 Beta. To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta Let’s take a look at what’s new in TypeScript 5.9! Minimal and Updated tsc --init Support for import defer Support for --module node20 Summary Descriptions in DOM APIs Expandable Hovers (Preview) Configurable

Today we’re excited to announce the launch of the Awesome GitHub Copilot Customizations repo! The Awesome Copilot repo is a community-driven resource with custom instructions, reusable prompts, and custom chat modes that helps you get consistent AI assistance. In other words, Awesome Copilot helps you get the most out of GitHub Copilot by letting you tailor it to your needs. And even better, the a

Copilot agent mode is the next evolution in AI-assisted development—and it’s now generally available in the Visual Studio June update. Agent mode turns GitHub Copilot into an autonomous pair programmer capable of handling multi-step development tasks from end to end. It builds a plan, executes it, adapts along the way, and loops through tasks until completion. Agent mode can analyze your codebase,

No trial. No credit card required. Just your GitHub account. Managing logs in production environments involves tricky trade-offs. You want detailed logs when things go wrong, but you don’t want to pay storage costs for logs that never get examined. While log sampling helps reduce log volume by emitting only a percentage of logs, sometimes you need a different approach. Enter log buffering in .NET

We are super excited to introduce a new feature that was released as part of .NET 10 Preview 4 that makes getting started with C# easier than ever. You can now run a C# file directly using dotnet run app.cs. This means you no longer need to create a project file or scaffold a whole application to run a quick script, test a snippet, or experiment with an idea. It’s simple, intuitive, and designed t

What is Edit? Edit is a new command-line text editor in Windows. Edit is open source, so you can build the code or install the latest version from GitHub! This CLI text editor will be available to preview in the Windows Insider Program in the coming months. After that, it will ship as part of Windows 11! How to use Edit Open Edit by running edit in the command line or running edit <your-file-name>

No trial. No credit card required. Just your GitHub account. C# 14 introduces extension members. C# has long had extension methods and the new extension member syntax builds on this familiar feature. The latest preview adds static extension methods and instance and static extension properties. We’ll release more member kinds in the future. Extension members also introduce an alternate syntax for e

We’re pleased to announce that one of the latest additions to the list of official WSL distros is Fedora Linux! The Fedora Project has taken advantage of WSL’s new tar-based architecture to produce WSL images beginning with Fedora 42. Try it out To install it, run wsl –-install FedoraLinux-42and then launch it with wsl –d FedoraLinux-42. You’ll be prompted for a username, and then you’ll be ready

OpenAI’s gpt-4o-audio-preview is a powerful multimodal model that enables audio input and output capabilities, allowing developers to create more natural and accessible AI interactions. This model supports both speech-to-text and text-to-speech functionalities in a single API call through the Chat Completions API, making it suitable for building voice-enabled applications where turn-based interact

Over the past 5 years, we’ve had many incredible opportunities to engage with game developers. From AAA studios to indie developers, the passion for slashing iteration times is significant. Amidst all the fantastic feedback we’ve received for Visual Studio, one sentiment has rung loud and clear: a desire to debug optimized C++ code without sacrificing performance. Although game developers have voi

Want to get started with AI development, but not sure where to start? I’ve got a treat for you – we have a new AI Chat Web App template now in preview. 😊 This template is part of our ongoing effort to make AI development with .NET easier to discover and use, with scaffolding and guidance within Visual Studio, Visual Studio Code, and the .NET CLI. Please note that this template is in preview, and

The latest updates to WSL bring new enterprise security features, new improvements to WSL distros, and the announcement that RedHat is officially becoming a WSL distro! Check out the table of contents in this post for a quick overview of all the announcements! Red Hat is becoming an official WSL distro Although you can run any Linux distro in WSL, being an official distro makes it easier for WSL u

We’re thrilled to unveil the public preview of AI Shell! AI Shell enhances your shell with AI capabilities to facilitate your interactions with the command line. AI Shell create an interactive shell that can interact with various large language model and provides a framework that you can use to build a custom system that meet your needs. Users can interact with the AI agents in a conversational ma

If you write Windows 95 setup as an MS-DOS app, then it runs on all three platforms. That’s great! You need to write only one setup program. The downside is that it’s going to be a text-mode setup program, which looks ugly and gives a poor initial impression of what is supposed to be a brand new GUI world. At the other extreme, you can write Windows 95 setup as a 32-bit GUI program, but that means

Today, we are excited to announce the launch of .NET 9, the most productive, modern, secure, intelligent, and performant release of .NET yet. It’s the result of another year of effort on the part of thousands of developers from around the world. This new release includes thousands of performance, security, and functional improvements. You will find sweeping enhancements across the entire .NET stac

If you go exploring the Unicode Standard, you may be surprised to find that there are some characters that have case distinction yet are themselves neither uppercase nor lowercase. Oooooh, spooky. In other words, it is a character c with the properties that toUpper(c) ≠ toLower(c), yet c ≠ toUpper(c) and c ≠ toLower(c). Congratulations, you found the mysterious third case: Title case. There are so

Today the Direct3D and HLSL teams are excited to share some insight into the next big step for GPU programmability. Once Shader Model 7 is released, DirectX 12 will accept shaders compiled to SPIR-V™. The HLSL team is committed to open development processes and collaborating with The Khronos® Group and LLVM Project. We’re sharing this information at the beginning of our multi-year development proc

Some other notable examples: Improved SIMD comparisons. dotnet/runtime#104944 and dotnet/runtime#104215 improve how vector comparisons are handled. Improved ConditionalSelects. dotnet/runtime#104092 from @ezhevita improves the generated code for ConditionalSelects when the condition is a set of constants. Better Const Handling. Certain operations are only optimized when one of their arguments is a