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Microsoft is updating its author-signing certificate starting September 23, 2026
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.
Creating a memory dump in C#
Learn how to create a memory dump in C# to capture the state of your application for debugging purposes.
Build Your Own AI Agent Harness in C#, the MafClaw Live Series
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.
Performance Improvements in .NET 11
Take a tour through hundreds of performance improvements in .NET 11.
Share your .NET story with the community
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.
Use C# unions and closed hierarchies in ASP.NET Core
Learn how C# unions and closed hierarchies work with System.Text.Json across ASP.NET Core Minimal APIs, MVC, SignalR, Blazor, and OpenAPI.
Announcing .NET 11 Release Candidate 1
.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.
.NET Conf 2026 Community Days Call for Presenters Is Open
Submit your session proposal for the community-led .NET Conf 2026 Community Days by October 6, 2026.
.NET and .NET Framework September 2026 servicing releases updates
A recap of the latest servicing updates for .NET and .NET Framework for September 2026.