.NET Archive

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 stack from the programming languages, developer tools, and workloads enabling you to build with a unified platform and easily infuse your apps with AI. ↫ .NET Team at the .Net Blog All I know is that these are very important words, and a very important release, for thousands and thousands of unknown developers slaving away in obscurity, creating, maintaining, and fixing endless amounts of corporate software very few of us ever actually get to see very often. They toil away for meager pay in the 21st century version of the coal mines of the 19th century, without any recognition, appreciation, or applause. They work long hours, make their way through the urban planning hell that is modern America, and come home to make some gruel and drink water from lead pipes, waiting for the sweet relief of what little sleep they manage to get, only to do it all over again the next day. …I may have a bit of a skewed perception of reality for most IT people. In all seriousness, .NET is a hugely popular set of tools and frameworks, and while it’s probably not the most sexy topic in the tech world, any new release matters to a ton of people. .NET 9.0. This new version’s main focus seems to be performance, with over 1000 performance-related changes tot he various components that make up .NET. In a blog post about these performance improvements, Stephen Toub explains in great detail what some of the improvements are, and where the benefits lie. Of course, there’s an insane amount of talk about “AI” features in .NET 9, and apparently .NET MAUI is seeing a surge in popularity on Android, if you believe Microsoft (“30$” increase in “developer usage” means little when you don’t provide a baseline). .NET MAUI is Microsoft’s cross-platform framework for building applications for Android, iOS, macOS, and Windows. Among other things, .NET MAUI 9 provides more access to platform-native features, as well as benefiting from some of the performance improvements. There’s also a paragraph about .NET 9 development on Windows, just in case you thought the .NET team forgot Windows existed. With .NET 9, your Windows apps will have access to the latest OS features and capabilities while ensuring they are more performant and accessible than ever before. Whether you are starting a new modern app with WinUI 3 and the Windows App SDK or modernizing your existing WPF and WinForms applications, your Windows apps run best on .NET 9. We have been collaborating closely with the Windows developer community to bring features that you have been requesting. This includes Native AOT support for WinUI 3 for smaller and more performant apps, modern theming enhancements with Fluent UI for WPF, and WinForms gets a boost with a new Dark Mode, modern icon APIs, and improved asynchronous API access with Control.InvokeAsync. ↫ .NET Team at the .Net Blog There’s way more on top of all of this, from changes to the languages .NET uses to new releases of the various developer tools, like Visual Studio.

Microsoft is handing over the Mono project to WineHQ, which came as a bit of a surprise announcement today. We are happy to announce that the WineHQ organization will be taking over as the stewards of the Mono Project upstream at wine-mono/Mono · GitLab (winehq.org). Source code in existing mono/mono and other repos will remain available, although repos may be archived. Binaries will remain available for up to four years. Microsoft maintains a modern fork of Mono runtime in the dotnet/runtime repo and has been progressively moving workloads to that fork. That work is now complete, and we recommend that active Mono users and maintainers of Mono-based app frameworks migrate to .NET which includes work from this fork. ↫ Mono’s website Wine make use of Mono, so this seems like a natural home for the project. Mono is an open source implementation of Microsoft’s .NET, and is available on a wide variety of platforms, but lately it’s been languishing a bit, with no major release since 2019, and only small patches since then. Microsoft gained stewardship over the Mono project when it acquired Xamarin in 2016.

In this article, I describe my journey creating a barely functional rust backend enabling compilation for the .NET runtime (Usually used to run C# and F#). It is currently in the proof-of-concept stage, but I believe it still may be of some interest. Rust is everywhere.

Here is a dumb question that you probably never asked yourself: What is the minimal amount of bytes we need to store in a .NET executable to have the CLR print the string "Hello, World!" to the standard output? In this post, we will explore the limits of the .NET module file format, get it as small as possible, while still having it function like a normal executable on a typical Windows machine with the .NET Framework installed. The answer is “way, way smaller than I thought”.

Microsoft is reversing a decision to remove a key feature from its upcoming .NET 6 release, after a public outcry from the open source community. Microsoft angered the .NET open source community earlier this week by removing a key part of Hot Reload in the upcoming release of .NET 6, a feature that allows developers to modify source code while an app is running and immediately see the results. It’s a feature many had been looking forward to using in Visual Studio Code and across multiple platforms, until Microsoft made a controversial last-minute decision to lock it to Visual Studio 2022 which is a paid product that’s limited to Windows. Sources at Microsoft, speaking on condition of anonymity, told The Verge that the last-minute change was made by Julia Liuson, the head of Microsoft’s developer division, and was a business-focused move. The scorpion and the frog make it a little further across the river. For now.

I at least peruse if not review in depth the vast majority of all those PRs, and every time I see a PR that is likely to impact performance, I make a note of it in a running log, giving me a long list of improvements I can revisit when it’s blog time. That made this August a little daunting, as I sat down to write this post and was faced with the list I’d curated of almost 550 PRs. Don’t worry, I don’t cover all of them here, but grab a large mug of your favorite hot beverage, and settle in: this post takes a rip-roarin’ tour through ~400 PRs that, all together, significantly improve .NET performance for .NET 6. You might want to get some coffee.

Microsoft said this week that it will support Visual Basic on .NET 5.0 but will no longer add new features or evolve the language. “Starting with .NET 5, Visual Basic will support Class Library, Console, Windows Forms, WPF, Worker Service, ASP.NET Core Web API … to provide a good path forward for the existing VB customer who want to migrate their applications to .NET Core,” the .NET team wrote in a post to the Microsoft DevBlogs. “Going forward, we do not plan to evolve Visual Basic as a language … The future of Visual Basic … will focus on stability, the application types listed above, and compatibility between the .NET Core and .NET Framework versions of Visual Basic.” Alright then.

We’re excited to announce the release of .NET Core 3.0. It includes many improvements, including adding Windows Forms and WPF, adding new JSON APIs, support for ARM64 and improving performance across the board. C# 8 is also part of this release, which includes nullable, async streams, and more patterns. F# 4.7 is included, and focused on relaxing syntax and targeting .NET Standard 2.0. You can start updating existing projects to target .NET Core 3.0 today. The release is compatible with previous versions, making updating easy.

In addition, Samsung is bringing .NET to its Tizen platform, which it claims is installed on 50 million devices. Tizen is uses in Samsung smartwatches and TVs, among other things.

Microsoft has just announced they open sourced .NET," including ASP.NET, the .NET compiler, the .NET Core Runtime, Framework and Libraries, enabling developers to build with .NET across Windows, Mac or Linux." They're including a patent promise. Miguel de Icaza reports that the Mono project will be "replacing chunks of Mono code that was either incomplete, buggy, or not as fully featured as it should be with Microsoft's code," and he also notes that "Microsoft has stated that they do not currently plan on taking patches back or engaging into a full open source community style development of this code base, as the requirements for backwards compatibility on Windows are very high." Nevertheless, this is a very interesting development that demonstrates that Microsoft is serious about remaining relevant.

This is more than just a code dump - Microsoft is launching the .NET Foundation, with representatives from Microsoft, GitHub, and Xamarin, among others, to act as stewards for the various related open source projects.

"Last week at the BUILD conference, we had the pleasure of announcing the next version of the .NET Framework and releasing a developer preview at the same time. We have so many new things in .NET 4.5 to discuss with our developer community - we're excited to have this opportunity to begin a discussion about each of them."