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Sep 25, 2026
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AG-UI Protocol now has a first-class .NET SDK

Daniel Roth

The new AG-UI .NET SDK enables .NET services to expose and consume interoperable agent endpoints using Microsoft.Extensions.AI.

Sep 23, 2026
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Microsoft is updating its author-signing certificate starting September 23, 2026

The NuGet Team

Starting September 23, 2026, Microsoft is updating the author-signing certificate used for NuGet packages. Customers using trusted signer policies or certificate fingerprint verification should add the new certificate as soon as possible.

Sep 22, 2026
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Creating a memory dump in C#

Aaron Powell

Learn how to create a memory dump in C# to capture the state of your application for debugging purposes.

Sep 16, 2026
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Build Your Own AI Agent Harness in C#, the MafClaw Live Series

Bruno Capuano

I am building a complete C# agent live, from a single call around an IChatClient to a production-ready, observable, governed agent, using the Microsoft Agent Framework harness in a 4-part Microsoft Reactor series.

Sep 15, 2026
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Performance Improvements in .NET 11

Stephen Toub - MSFT

Take a tour through hundreds of performance improvements in .NET 11.

Sep 14, 2026
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Share your .NET story with the community

Luis Quintanilla

Share how your team uses .NET to solve real problems and help us bring more community stories to .NET Conf 2026 and other .NET channels.

Sep 10, 2026
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Use C# unions and closed hierarchies in ASP.NET Core

Dmitrii Korolev

Learn how C# unions and closed hierarchies work with System.Text.Json across ASP.NET Core Minimal APIs, MVC, SignalR, Blazor, and OpenAPI.

Sep 8, 2026
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Announcing .NET 11 Release Candidate 1

.NET Team

.NET 11 Release Candidate 1 is available with improvements across libraries, runtime, SDK, MSBuild, NuGet, C#, F#, ASP.NET Core, .NET MAUI, and Windows Forms.

Sep 8, 2026
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.NET Conf 2026 Community Days Call for Presenters Is Open

Javier,
Chris,
Jon

Submit your session proposal for the community-led .NET Conf 2026 Community Days by October 6, 2026.