2025-10-03: Aspire 9.5, The Future of Avalonia's Rendering, Microsoft Agent Framework (Preview), Visual Studio September Update

Published on Friday, 03 October 2025

トピックス

Announcing Aspire 9.5 - .NET Blog

https://devblogs.microsoft.com/dotnet/announcing-dotnet-aspire-95/

The Future of Avalonia's Rendering - Avalonia UI

https://avaloniaui.net/blog/the-future-of-avalonia-s-rendering

Introducing Microsoft Agent Framework (Preview): Making AI Agents Simple for Every Developer - .NET Blog

https://devblogs.microsoft.com/dotnet/introducing-microsoft-agent-framework-preview/

Visual Studio September Update - profiler agent, app modernization, and more - Visual Studio Blog

https://devblogs.microsoft.com/visualstudio/visual-studio-september-update/

C#サーバーをなぜLinuxで動かすのか - tech.guitarrapc.cóm

https://tech.guitarrapc.com/entry/2025/09/27/173000

ReSharper and Visual Studio 2026: Day-One Compatibility, Migration Steps, and Performance Gains | The .NET Tools Blog

https://blog.jetbrains.com/dotnet/2025/10/02/resharper-and-visual-studio-2026/

Rider Roadmap: What to Expect From the Upcoming Updates and Releases | The .NET Tools Blog

https://blog.jetbrains.com/dotnet/2025/09/25/rider-rider-roadmap-2025-3/

https://devblogs.microsoft.com/ifdef-windows/announcing-winui-gallery-2-7/

Preparing Your .NET MAUI Apps for Google Play's 16 KB Page Size Requirement - .NET Blog

https://devblogs.microsoft.com/dotnet/maui-google-play-16-kb-page-size-support/

Release 2.0.0 Experimental 1 (2.0.250930001-experimental1) 🧪 · microsoft/WindowsAppSDK

https://github.com/microsoft/WindowsAppSDK/releases/tag/v2.0-exp1

リリース

アーティクル、スライドなど

コードの常識、世界の非常識？ C#数値フォーマット「N0」が秘める力

https://qiita.com/futayubi5656/items/0a6e32308cf52855eb3f

Build Your Own GPT from Scratch with C# and TorchSharp (CPU-Only!)

https://dev.to/auyeungdavid_2847435260/build-your-own-gpt-from-scratch-with-c-and-torchsharp-cpu-only-3ch5

'Native' TypeScript 7 Previews in Visual Studio 2026 Insiders -- Visual Studio Magazine

https://visualstudiomagazine.com/articles/2025/10/02/native-typescript-7-previews-in-visual-studio-2026-insiders.aspx

【.NET 9.0 + C#13】CommunityToolkit.Mvvmで作るモダンWPFアプリケーション

https://qiita.com/okadabasso/items/ebed5a092389bc51bf76

VS Live! Orlando – Your Ultimate Learning Adventure - Visual Studio Blog

https://devblogs.microsoft.com/visualstudio/visual-studio-live-orlando-2025/

Microsoft Agent Framework (C#) 入門 その1「雑感」とハローワールド

https://zenn.dev/microsoft/articles/agent-framework-001

【2025】.NET Aspireで管理するReact + Vite + ASP.NET Core 【ローカル環境】

https://qiita.com/takashiuesaka/items/9e4cbb968d729bd43161

【初心者歓迎】C#だけでWebゲームを1時間で作る javascriptやAJAX不要！Blazorの凄さを体験する

https://qiita.com/masayahak/items/0e6c82497ad63c856e3f

C# の補間文字列ハンドラーで sscanf を実装してみた

https://qiita.com/hez2010/items/6f04c6260ba75d8ddb17

【C#】Aspire+Azureでリソース作成時にテナントIDが「f8cdef31-a31e-4b4a-93e4-5f571e91255a」となりエラーになる

https://qiita.com/KM_20005/items/b544c2886ee06f0b24fe

Azure OpenAI .NET SDKでBatch処理を実行する

https://zenn.dev/microsoft/articles/azure-openai-batch-dotnet

Publishing NuGet packages from GitHub actions the easy way with Trusted Publishing

https://andrewlock.net/easily-publishing-nuget-packages-from-github-actions-with-trusted-publishing/

Azure App Service から Azure Key Vault を安全に利用する（ASP.NET Core編）

https://zenn.dev/zead/articles/appservice-keyvault

Radzen.BlazorのRadzenAIChatコンポーネントでAIと会話してみる

https://zenn.dev/srtia2318/articles/introduce6-radzen-ai-chat-4562a2f748f5de

.NET MAUI RC1 Brings Diagnostics and Experimental Android CoreCLR Support

https://www.infoq.com/news/2025/09/net-maui-rc1/

【初心者向け】foreachで回せる便利な独自コレクションを作ろう

https://zenn.dev/semicolon/articles/bc559efc80acba

C#のrecord型で一意な識別子を持ちたい

https://zenn.dev/panda728/articles/b444eb2e3330cb

VSCode + WPF + Blazor Hybridを動かしてみたら想像以上に面白かった

https://qiita.com/h-tanabe/items/8fc4b38d59a5a8277874

Safe zero-copy operations in C#

https://ssg.dev/safe-zero-copy-operations-in-c/

外部テナントで顧客ユーザー管理 ― 基本的なMFA認証を組み込んでみよう（C#）

https://zenn.dev/furulab/articles/e149e813d29dd9

DictionaryとLookUpの使い分け

https://qiita.com/sebayashi-tomoya/items/82c52e26d3b329970a46

【C#】ボタン重複実行はなぜ起きる？ - Windowsメッセージキューの仕組みと対策

https://qiita.com/Sakai_path/items/dcc004631ada77bff9a9

【C#】null判定をコンパイラに適切に伝える[NotNull]

https://zenn.dev/arika/articles/20250927-csharp-flow-analyze

WebAPI(.NET)をJSON-RPCで実装してみる

https://zenn.dev/srtia2318/articles/organize-info12-jrpc-f8ce7f7c65f5ca

Azure Durable Functions と Microsoft.Extensions.AI(MEAI) の統合の試行をしてみた

https://zenn.dev/microsoft/articles/agent-on-durable-functions

.NET Native Apps CLI Cheatsheet

https://platform.uno/blog/net-native-apps-cli-cheatsheet/

Using the new SqlVector type with EF Core and Dapper - Azure SQL Devs’ Corner

https://devblogs.microsoft.com/azure-sql/using-the-new-sqlvector-type-with-ef-core-and-dapper/

【dll編】VSCodeでOutlookのCOMアドインをつくる - Qiita

https://qiita.com/msms/items/4774a0e86ec6ecb349e7

Preparing for the .NET 10 GC

https://maoni0.medium.com/preparing-for-the-net-10-gc-88718b261ef2

.Net CoreのエンドポイントをVertical Slice Architectureで実装してみたら結構良かった

https://zenn.dev/acntechjp/articles/7c7235bd5e4e21

C#開発におけるAIを使った基本設計書作成と効果の検証

https://zenn.dev/nexta_/articles/21f8c6a298406e

The $150 Secret Hiding in Plain Sight - Visual Studio Blog

https://devblogs.microsoft.com/visualstudio/unlock-vss-benefits-myvisualstudio/

【C#】C# 14 / .NET 10 の新機能 (RC 1 時点) - ねののお庭。

https://blog.neno.dev/entry/2025/09/28/193532