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Highlights

Your Entire Engineering Floor Just Stopped Coding

And the developers running Claude Code and GitHub Copilot CLI didn't notice... Status Page Says 'Operational.' Your Subagents Say Otherwise. If you're running autonomous agents in any serious capacity, you've experienced this: model provider outages aren't edge cases —...
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Breaking Change Ahead: Graph API Updates to Sensitive Email Properties

On 12/31/2026, we will begin restricting updates to sensitive properties on non-draft email messages (including subject, body, and recipients). Apps will need Mail-Advanced.ReadWrite (or .All / .Shared) with admin consent to continue modifying these fields. Review your current usage and update permissions now to avoid unexpected failures.
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Dec 1, 2025
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How do I get my edit control text to be autoselected when I choose it to be the default focus in my dialog?

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Raymond Chen
Remembering some old APIs.
The Old New Thing
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Dec 1, 2025
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Accelerating AI Development with GitHub Copilot: Real-World Use-Cases

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isedevblog
This blog post shares real-world experiences from Microsoft's ISE team using GitHub Copilot to accelerate AI development workflows, demonstrating how AI tools can significantly speed up tasks like creating documentation, class diagrams, data visualizations, and demo scripts when used by experienced developers.
ISE Developer Blog
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Nov 28, 2025
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How can I have a Win32 drop-down combo box with a read-only edit control?

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Raymond Chen
You can ask for its handle and mark it read-only.
The Old New Thing
Nov 27, 2025
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Announcing ASP.NET Core OData 10.0.0 Preview 1

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Samuel Wanjohi
We're thrilled to announce the release of ASP.NET Core OData 10.0.0 Preview 1, a major modernization update that embraces .NET's native System.DateOnly and System.TimeOnly types! This release upgrades to .NET 10.0 and replaces OData's proprietary Edm.Date and Edm.TimeOfDay CLR wrapper...
OData
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Nov 27, 2025
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Visualizing GitHub Audit Log in Microsoft Defender

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Xuefeng,
sombanerjee
Key Observability Trends Around GitHub Security Modern enterprises are increasingly adopting DevSecOps practices, integrating security into every phase of the development lifecycle. Key observability trends include: Unified Security Dashboards: Organizations seek a single...
All things Azure
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Nov 27, 2025
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Message-only windows are for messaging, not as a convenient victim for hosting UI

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Raymond Chen
If you want to host UI, use a real window (possibly hidden).
The Old New Thing
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Nov 26, 2025
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.NET Day on Agentic Modernization Coming Soon

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Matt Soucoup
Join us live on December 9 to explore the newest, most practical ways to modernize your .NET apps with Azure, AI, and powerful agentic tooling.
.NET Blog
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Nov 26, 2025
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At what point in the Windows development cycle is it too late to change the text of a translatable string?

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Raymond Chen
The translation team sets the deadline.
The Old New Thing
Nov 26, 2025
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Announcing OData Model Builder 3.0.0 Preview 1 Release

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Samuel Wanjohi
We're excited to announce that OData Model Builder 3.0.0 Preview 1 has been officially released and is available on NuGet: Microsoft.OData.ModelBuilder 3.0.0 Preview 1 This is a major release that brings the library up to date with the latest .NET and OData ecosystem, featuring...
OData