2026-04-10: Avalonia 12, ASP.NET Core 2.3 EoS, ILSpy 10.0, C# 15 Union, Microsoft Agent Framework 1.0.0, ReSharper is Free for Non-Commercial Use

Published on Friday, 10 April 2026

トピックス

Avalonia 12 - Ready for What’s Next - Avalonia UI Blog

https://avaloniaui.net/blog/avalonia-12

ASP.NET Core 2.3 end of support announcement - .NET Blog

https://devblogs.microsoft.com/dotnet/aspnet-core-2-3-end-of-support/

Release ILSpy 10.0 · icsharpcode/ILSpy

https://github.com/icsharpcode/ILSpy/releases/tag/v10.0

Explore union types in C# 15 - .NET Blog

https://devblogs.microsoft.com/dotnet/csharp-15-union-types/

Release dotnet-1.0.0 · microsoft/agent-framework

https://github.com/microsoft/agent-framework/releases/tag/dotnet-1.0.0

ReSharper is Free for Non-Commercial Use - Sponsor Spotlight: JetBrains

https://dotnetfoundation.org/news-events/detail/sponsor-spotlight-jetbrainsReSharper

リリース

アーティクル、スライドなど

Running AI agents safely in a microVM using docker sandbox

https://andrewlock.net/running-ai-agents-safely-in-a-microvm-using-docker-sandbox/

Microsoft Agent Framework - Hosted Agents や Foundry IQ試してみる - Qiita

https://qiita.com/miyaura/items/08352824ba1e0d16e79e

dotInsights | April 2026 | The .NET Tools Blog

https://blog.jetbrains.com/dotnet/2026/04/08/dotinsights-april-2026/

Webinar – OSS Power-Ups: XenoAtom.Terminal.UI | The .NET Tools Blog

https://blog.jetbrains.com/dotnet/2026/04/09/webinar-oss-power-ups-xenoatom-terminal-ui/

Aspire 13.2 Released with Expanded CLI, TypeScript AppHost Preview, and Dashboard Improvements

https://www.infoq.com/news/2026/04/aspire-13-2-release/

BlazorのStateHasChangedの役割と、適切な呼び出しタイミングとは?

https://zenn.dev/nexta_/articles/blazor-rerendering-triggers

【C#】IDisposableの実装，面倒じゃないですか? - Qiita

https://qiita.com/ikuzak/items/8ca90666deead83f6664

Containerize an ASP.NET Core BFF and Angular frontend using Aspire

https://timdeschryver.dev/blog/containerize-an-aspnet-core-bff-and-angular-frontend-using-aspire

Guid.CreateVersion7() で生成した UUIDv7 は SQL Server で期待通りに使えない - Qiita

https://qiita.com/ichifuji_nitaka/items/a5d909bf6dacfc4c77a8

【C#】Blazor Server + Microsoft Entra ID ログイン・ログアウト最小実装 - Qiita

https://qiita.com/KM_20005/items/f84541318ece2b934403

GitHub Actions などの環境で Aspire の AppHost でサーバーを起動すると起動できないことがある

https://zenn.dev/mayuki/articles/914caf07a688b1

Microsoft Agent FrameworkをローカルLLMで試してみる その1

https://zenn.dev/yy7613/articles/81da48e0d8c418

V1 リリース！ - Microsoft Agent Framework (C#) V1 その1

https://zenn.dev/microsoft/articles/agentframework-v1-001

シンプルな画像一括切り抜きアプリを開発した話

https://zenn.dev/ringo_acid/articles/06eec64bae29db

Phi Silica AIを使用する。 - Qiita

https://qiita.com/NWLab/items/61459b185b492183cb03

WinUI 3 の悪いところ

https://zenn.dev/shinta0806/articles/winui3-disadvantages

【C#】ゲーム画面をOCRするのに最適なライブラリを検証する - Qiita

https://qiita.com/nabemax/items/9f149a8c35dac5b20e81

.NETでパッケージのロック運用を考える - Qiita

https://qiita.com/karuakun/items/f11d8c6d02039bae8a6a

Claudeと話せるWindows Todoアプリの開発(MCP連携 × タスク間依存関係グラフ)

https://zenn.dev/tanayuuu/articles/82633df0cba6f8

Using Roslyn to analyze and rewrite code in a solution - Gérald Barré

https://www.meziantou.net/using-roslyn-to-analyze-and-rewrite-code-in-a-solution.htm

How I accidentally made the fastest C# CSV parser

https://bepis.io/blog/turbo-csv-parser/

Swift .NET Bindings: The Objective Sharpie Replacement for .NET MAUI and iOS | Justin Wojciechowski

https://wojosoftware.com/blog/swift-dotnet-binding-tool/

素早く JSON を返したいとき、とりあえず IAsyncEnumerable で返すと速く返せるぞ

https://zenn.dev/juners/articles/62089cb88105b9

Running .NET 10.0 on FreeBSD 15.0

https://officialaptivi.wordpress.com/2026/04/08/running-net-10-0-on-freebsd-15-0/

C#(Photino.NET)+Web Componentで画像ビューワーを作ってみた

https://zenn.dev/radian_jp/articles/5e4d7ec999e174

Take full control of your floating windows in Visual Studio - Visual Studio Blog

https://devblogs.microsoft.com/visualstudio/take-full-control-of-your-floating-windows-in-visual-studio/

Your Migration's Source of Truth: The Modernization Assessment - .NET Blog

https://devblogs.microsoft.com/dotnet/your-migrations-source-of-truth-the-modernization-assessment/

【.NET】OverloadResolutionPriority属性を用いて標準ライブラリの互換性を維持するランタイムでの修正事例

https://zenn.dev/prozolic/articles/e091ef95fd883c

ライブラリ、リポジトリ、ツールなど

shibayan/openapi-weaver: OpenAPI documents into strongly typed C# HTTP clients at build time with an incremental Roslyn source generator.

https://github.com/shibayan/openapi-weaver

ツイート