トピックス
Aspire 13.6: Your dashboard gets memory | Aspire Blog
https://devblogs.microsoft.com/aspire/whats-new-aspire-13-6/
WSL containers is now generally available
https://blogs.windows.com/windowsdeveloper/2026/09/29/wsl-containers-now-generally-available/
Visual Studio September Update - Power Your Workflow with Your Model - Visual Studio Blog
Release v5.0.0 · microsoft/fluentui-blazor
https://github.com/microsoft/fluentui-blazor/releases/tag/v5.0.0
Out now: The Microsoft Fluent UI #Blazor library v5!
— Vincent Baaij (@vnbaaij) September 25, 2026
It is finally here.
As said, this is not just a drop-in replacement for v4. But we have docs and an MCP server to help you migrate.
See https://t.co/7ZUFru9D5s for more information. Packages are on NuGet Now! pic.twitter.com/uLxI9nAWMQ
WinAppCLI v0.7.0 - Windows Sandbox automation, Native AOT support, single-file applications, and more - #ifdef Windows
https://devblogs.microsoft.com/ifdef-windows/winappcli-v0-7-0-release-announcement/
AG-UI Protocol now has a first-class .NET SDK - .NET Blog
https://devblogs.microsoft.com/dotnet/ag-ui-dotnet-sdk/
アーティクル、スライドなど
Running NVIDIA Nemotron 3 Diarization on a Windows CPU — with .NET and Japanese Audio
Build Agentic UI with the new Blazor AI components - .NET Blog
https://devblogs.microsoft.com/dotnet/build-agentic-ui-blazor/
My OSS Projects: Electron.NET
https://dev.to/florianrappl/my-oss-projects-electronnet-2cgl
C#好きが集まる場所は楽しい － C# Kaigi 2026参加記
https://zenn.dev/nexta_/articles/1fbd70c64a1ac6
任意の OpenAPI 仕様から MCP サーバーを立てる CLI ツール「McpSense」を作りました - Qiita
https://qiita.com/pierusan2010/items/8b018653275155039245
MagicOnionで弾幕エンジンFsBulletML2を使おう — UnityとGodotは受けた座標を描画するだけ(おまけJev)
https://zenn.dev/zecl/articles/4c33881b221006
すこし踏み込む CancellationToken
https://zenn.dev/poipoionigiri/articles/3826f7675d39fd
usingはいつDisposeを呼ぶのか：例外・using宣言・GCを実験で確かめる - Qiita
https://qiita.com/tainn_app_dev/items/8cb801e84ef5d2488c77
C#でMCPサーバーを自作してClaude Codeのツールに追加してみた - Qiita
https://qiita.com/istb16/items/76807746fb8f3a5e72a1
System.Text.Encoding.CodePages のインストールは不要になりました (C#) - Qiita
https://qiita.com/c-yan/items/7228fbe854cf19617514
.NET 11, CoreCLR and Google Play’s DEX Optimization: What .NET MAUI Developers Need to Know
The hidden trap of fixed buffers in C#
https://minidump.net/the-hidden-trap-of-fixed-buffers-in-csharp/
How fast can you fix a UTF-16 string in C#?
https://lemire.me/blog/2026/09/26/how-fast-can-you-fix-a-utf-16-string-in-c/
The Path to CoreCLR #2: Embedding CoreCLR - Scripting / C# & .NET - Unity Discussions
https://discussions.unity.com/t/the-path-to-coreclr-2-embedding-coreclr/1737339
ライブラリ、リポジトリ、ツールなど
Litenova-Solutions/Fuse: Faster .NET build and test loop for AI coding agents.
https://github.com/Litenova-Solutions/Fuse
akeit0/dotdbg
https://github.com/akeit0/dotdbg
AI Agent向け .NET debugger CLI
— akeit0 (@Akeit0_) September 28, 2026
「dotdbg」 を公開しました！https://t.co/NiBf3x2kIx
ツイート
A new keyboard shortcuts options page is coming to Visual Studio. It uses the new settings system which means you can now store specific keyboard shortcuts for specific solutions/repos. It's highly flexible.
— Mads Kristensen (@madskristensen) September 30, 2026
Coming soon... pic.twitter.com/HmKuH5iDiX