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We’ve shared many articles on AI agents and MCP in The .NET Insider. But across newsletter issues, they’re easy to miss and hard to follow in order. We’ve brought 25 of them together into a reading guide for C# and .NET developers, so you can start reading in one place. Start with the AI building blocks, move into MCP servers and Microsoft Agent Framework, then explore agent UIs, testing, and evaluation. If you’re already building, jump straight to the section you need and keep going. Guide: dotnetdevs.io/guides/ai-agen… #dotnet #ai

🔐 Already patched @dotnet this month? Update again. @Microsoft 's out-of-band security releases: • 8.0.33 • 9.0.22 • 10.0.14 • 11 RC3 These include fixes left incomplete on October 13. Microsoft announcement: devblogs.microsoft.com/dotne… More Updates: dotnet.news

Coming in The .NET Insider #31: .NET 11 RC2, dotnetup, Copilot SDK with your own model, Blazorise 2.4, MAUI's Xcode 27 migration, and practical reads on retries and agent permissions. 10 articles for C#/.NET developers. dotnet.news/p/the-net-inside…

Creating a memory dump in C#

How do you debug a @dotnet app that hangs in production? @slace shows a C# pattern that detects thread-pool starvation and writes a memory dump on Windows or Linux, ready to open in Visual Studio. 🌐More Updates: dotnet.news 📖Read it here: devblogs.microsoft.com/dotne… #dotnet #csharp

Do you remember when you joined X? I do! #MyXAnniversary

Inside .NET 11 performance

C# unions in ASP.NET Core

In @dotnet 11, C# 15 unions in ASP.NET Core: JSON contracts, closed hierarchies, and pattern matching. 🔗Details: devblogs.microsoft.com/dotne… 🌐More Updates: dotnet.news #dotnet #dotnetdevelopers

🚀 The .NET Insider - Issue #28 is here. C# 15, .NET 11 Preview 7, MSTest + Native AOT, Azure DevOps MCP GA, security fixes, NuGet key changes, local AI, Aspire, and more. Read: dotnet.news/p/the-net-inside… #dotnet #dotnetdevelopers

🔐 August 2026 @dotnet servicing updates are out. .NET 10.0.11, 9.0.19, and 8.0.30 address 10 CVEs, including remote code execution and elevation-of-privilege vulnerabilities. .NET Framework updates are also available. 🌐More updates: dotnet.news 🔗Details: devblogs.microsoft.com/dotne… #dotnet #dotnetdevelopers

C# 15 preview is available with @dotnet 11 Preview 7. It introduces union types, closed hierarchies, extension indexers, collection-expression arguments, labeled break/continue, and new memory-safety work. 🌐More updates: dotnet.news 🔗Explore what’s new: devblogs.microsoft.com/dotne… #csharp #dotnet

Visual Studio has a new Copilot Agent

𝗧𝗵𝗲 𝗼𝗳𝗳𝗶𝗰𝗶𝗮𝗹 𝗠𝗖𝗣 𝗖# 𝗦𝗗𝗞 𝘃𝟮.𝟬 𝗶𝘀 𝗵𝗲𝗿𝗲.

The official MCP C# SDK v2.0 is here. 🚀 Stateless HTTP by default, Multi Round-Trip Requests, and support for the 2026-07-28 MCP spec — with backward compatibility. 🌐More Updates: dotnet.news 🔗devblogs.microsoft.com/dotne… @jeffhandley #dotnet #MCP

The .NET Insider - Issue 26 is live! Inside: • .NET 11 Preview 6 • Agent Skills for .NET • .NET MAUI on CoreCLR • July servicing updates • GitHub Copilot modernization • Long-running MCP tools Read: dotnet.news/p/the-net-inside… #dotnet #dotnetdevelopers

Agent Skills for @dotnet is now stable and production-ready. 🚀 Package reusable domain expertise as file-, class-, or code-defined skills, load it only when needed, and govern access with approvals and controlled script execution. dotnet.news devblogs.microsoft.com/agent… #dotnet #AI

.𝗡𝗘𝗧 𝟭𝟭 𝗣𝗿𝗲𝘃𝗶𝗲𝘄 𝟲 𝗶𝘀 𝗻𝗼𝘄 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲