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From dotnet run to Foundry Hosted Agent in 3 lines of C#
You built an agent with Microsoft Agent Framework and it works great on your machine. Now what? Turns out deploying it to production takes 1 NuGet package, 3 lines of C#, and 2 commands. Let's do it.
Explore new features available in C# 15 preview
C# 15 ships with .NET 11. It adds union types, closed hierarchies, a preview of the updated unsafe model, and a few smaller changes that remove everyday ceremony.
Routing and Failover for Microsoft.Extensions.AI
Route requests across models and providers natively in Microsoft.Extensions.AI with RoutingChatClient, SemanticRoutingChatClient, and FailoverChatClient — new experimental primitives for content-based routing, failover, and custom routing policies.
Instructions Hygiene – What Frontier Models Still Need You to Say
Get the most out of the latest models by providing the right level of instructions
.NET 11 Preview 7 is now available!
Find out about the new features in .NET 11 Preview 7 across libraries, runtime, SDK, C#, ASP.NET Core, .NET MAUI, Entity Framework Core, F#, and Windows Forms.
.NET and .NET Framework August 2026 servicing releases updates
A recap of the latest servicing updates for .NET and .NET Framework for August 2026.
Test reporting in Microsoft.Testing.Platform: from red build to root cause
Microsoft.Testing.Platform brings failures into GitHub Actions and Azure DevOps, uses pipeline history to separate regressions from flakes, and preserves usable reports when a test host crashes.
Beyond Chat: live Speech-to-Text with Foundry Local and C#
Build a live speech-to-text app in C# with Foundry Local, a compact Nemotron model, and local model lifecycle management.
Strengthening NuGet Supply Chain Security: Reducing API Key Lifetime
NuGet API key durations will be reduced to 30 days starting August 17th. This change will significantly strengthen the integrity of the NuGet supply chain.