C# 14 Extension Members: The Shadowing Bug the Compiler Won't Warn You About
C# 14 lets extension blocks declare properties and static members — not just methods. That new surface comes with an old risk from a different angle: when a real member and an extension member share a name, the real member wins silently, with zero compiler warning. Verified against the .NET 10 SDK, including the exact diagnostics (CS9296, CS9339) a Roslyn-based test suite checks for.
GitHub Universe Day 2 Keynote
We're ending Universe the way it started: with the people who build in the open. Join us for a final session of open source voices, unexpected demos, and the kind of nerdy joy that reminds you why you got into this in the first place. More details coming soon. Join Universe Insider right after the keynote for live demos and deeper dives from today's announcements! https://githubuniverse.com/?utm_source=YouTube&utm_medium=Social&utm_campaign=net_livestream #GitHub #GitHubUniverse Stay up-to-date on all things GitHub by connecting with us: YouTube: https://gh.io/subgithub Blog: https://github.blog X: https://twitter.com/github LinkedIn: https://linkedin.com/company/github Insider newsletter: https://resources.github.com/newsletter/ Instagram: https://www.instagram.com/github TikTok: https://www.tiktok.com/@github About GitHub It’s where over 180 million developers create, share, and ship the best code possible. It’s a place for anyone, from anywhere, to build anything—it’s where the world builds software. https://github.com Connect with .NET: Blog: https://aka.ms/dotnet/blog Twitter: https://aka.ms/dotnet/twitter TikTok: https://aka.ms/dotnet/tiktok Mastodon: https://aka.ms/dotnet/mastodon LinkedIn: https://aka.ms/dotnet/linkedin Facebook: https://aka.ms/dotnet/facebook Docs: https://learn.microsoft.com/dotnet Forums: https://aka.ms/dotnet/forums 🙋♀️Q&A: https://aka.ms/dotnet-qa 👨🎓Microsoft Learn: https://aka.ms/learndotnet #dotnet
Blazor Community Standup: Free Syncfusion Toolkit for Blazor
Join us with the Syncfusion team to explore the free and open-source Syncfusion Toolkit for Blazor. We’ll see the components in action and show how you can use them to build your own Blazor apps. 🔗 Links: https://www.theurlist.com/blazor-standup-20261029 🎙️ Featuring: Daniel Roth, Shriram Sankaran #dotnet #aspnetcore #blazor
.NET + Foundry, Better Together: Decision Models in Action
What can you build with .NET and Microsoft Foundry? Let’s find out together! Join us for a series of practical explorations featuring new SDK capabilities, cool projects, and the latest Foundry features and services. With live demos, code, and plenty of curiosity, each episode offers something new for .NET developers looking to learn, experiment, and build with AI. 🔗 Learn more by exploring the resources: https://aka.ms/MSFTFoundryDoc https://aka.ms/AIappsfordotNETdev https://aka.ms/netfoundry-bt 📌 This event is part of a series. Learn more here: https://aka.ms/dotNET-Foundry #MicrosoftReactor #LearnConnectBuild #dotNET #MicrosoftFoundry #C# #AI #SDKs [eventID:27631]
Building a Claude Code dashboard
#ai #aiengineering #claude #claudecode
Blazor Welcomes Open-Source Contributions from Syncfusion
<p>Microsoft and Syncfusion are collaborating on Blazor through a free, open-source component toolkit, framework contributions, and developer tooling.</p> <p>The post <a href="https://devblogs.microsoft.com/dotnet/blazor-welcomes-syncfusion/">Blazor Welcomes Open-Source Contributions from Syncfusion</a> appeared first on <a href="https://devblogs.microsoft.com/dotnet">.NET Blog</a>.</p>
.NET AI Community Standup: Data Ingestion with .NET
Building AI applications with .NET takes more than connecting a model. It takes making your data useful. Join this AI Community Standup to explore how .NET’s building blocks for AI (Microsoft.Extensions.AI), data ingestion (Microsoft.Extensions.DataIngestion), and vector data (Microsoft.Extensions.VectorData) come together to solve that challenge. Discover how data ingestion, embeddings, and vector search support context engineering, including retrieval-augmented generation (RAG), to help you build practical AI applications grounded in your own documents and business data. 🔗 Links: https://learn.microsoft.com/en-us/collections/ng62sjt1k4jjep 🎙️ Featuring: Bruno Capuano (@elbruno), Luis Quintanilla #AI #DataIngestion #DotNet
Blazor Community Standup: Free Blazor components with Ignite UI
The Infragistics team joins us to show off the stable release of their free and open-source Ignite UI components for Blazor. Come see what’s included, how the components work, and how you can put them to use in your own Blazor apps. 🔗 Links: https://www.theurlist.com/blazor-standup-20261027 🎙️ Featuring: Daniel Roth, Konstantin Dinev, Damyan Petev #dotnet #aspnetcore #blazor
New Year, New Bot - Give Your Bot an Agentic Brain
Build an agentic AI experience with the GitHub Copilot SDK, integrating the agent with the .NET and Aspire backend and the M5Stack StackChan. Explore agent behaviors and tool use, then connect the software to the robot so it can respond through its display and movements. This session demonstrates how an SDK-driven agent can power a physical AI companion. 🔗 Learn more by exploring the resources: https://aka.ms/newyearnewbot https://aka.ms/GitHubCopilotSDKdocumentation https://aka.ms/M5StackStackChanfirmwaredevelopersetup https://aka.ms/M5StackStackChanproductinformation https://aka.ms/dotNETAspiredocumentation 📌 This event is part of a series. Learn more here: https://aka.ms/NewYearNewBotSeries #MicrosoftReactor #LearnConnectBuild #dotNet #Aspire #Agent #M5Stack #StackChan, #IoT #EdgeComputing
New Year, New Bot - Build Its AI Brain with .NET and Aspire
Build the bot's AI brain with a .NET backend orchestrated through .NET Aspire. Connect the backend to the StackChan from Episode 1, add the services and observability needed for local development, and create an end-to-end interaction that makes the physical desk robot responsive. This session shows how Aspire helps developers build and run the pieces of a connected AI companion. 🔗 Learn more by exploring the resources: https://aka.ms/newyearnewbot https://aka.ms/M5StackStackChanfirmwaredevelopersetup https://aka.ms/M5StackStackChanproductinformation https://aka.ms/dotNETAspiredocumentation 📌 This event is part of a series. Learn more here: https://aka.ms/NewYearNewBotSeries #MicrosoftReactor #LearnConnectBuild #dotNet #Aspire #Agent #M5Stack #StackChan, #IoT #EdgeComputing
New Year, New Bot - Bring Your AI Desk Robot to Life
Meet the M5Stack StackChan as a physical AI desk robot. Program its expressions and movements, connect it to a .NET backend and dashboard, and create a first end-to-end interaction. This hands-on session shows how hardware and .NET services can work together to bring a real desk companion to life. 🔗 Learn more by exploring the resources: https://aka.ms/newyearnewbot https://aka.ms/M5StackStackChanfirmwaredevelopersetup https://aka.ms/M5StackStackChanproductinformation https://aka.ms/dotNETAspiredocumentation 📌 This event is part of a series. Learn more here: https://aka.ms/NewYearNewBotSeries #MicrosoftReactor #LearnConnectBuild #dotNet #Aspire #Agent #M5Stack #StackChan, #IoT #EdgeComputing
Blazor Welcomes Open-Source Contributions from Infragistics
<p>Microsoft and Infragistics are collaborating on Blazor through free, open-source components, new .NET 11 analyzers, and developer tooling.</p> <p>The post <a href="https://devblogs.microsoft.com/dotnet/blazor-welcomes-infragistics/">Blazor Welcomes Open-Source Contributions from Infragistics</a> appeared first on <a href="https://devblogs.microsoft.com/dotnet">.NET Blog</a>.</p>
How to Loop Through a List in C#: Every Way, Benchmarked
How to loop through and iterate a List<T> in C# with foreach, for, ForEach, Index(), and spans, plus break, continue, safe removal, and benchmarks.
CQRS with MediatR, Revisited for .NET 10
A 2024 guide to CQRS with MediatR, rebuilt from scratch on .NET 10 instead of patched in place: what MediatR 14's license actually requires in practice, minimal API endpoints and IExceptionHandler replacing the original's placeholder exception behavior, SQLite in memory replacing a mocked DbContext in tests, the Native AOT limitations of reflection-based handler discovery, and a source-generated alternative that sidesteps the license question entirely.
.NET October 2026 Out-of-Band Security Updates
<p>Out-of-band security updates for .NET address the Brotli decoder vulnerability and tarball ownership vulnerability.</p> <p>The post <a href="https://devblogs.microsoft.com/dotnet/dotnet-october-2026-oob-security-updates/">.NET October 2026 Out-of-Band Security Updates</a> appeared first on <a href="https://devblogs.microsoft.com/dotnet">.NET Blog</a>.</p>