.NETPro #17: .NET 10 RC2, Framework Security Updates, and Minimal APIs in Focus, and More
🌏 Actionable .NET tips, latest updates, and community insights all in one place
Curious about what’s new in performance, security, and hands-on development this month? This edition has everything you need to stay ahead, from .NET 10 RC2 and the latest framework and security updates to Microsoft’s new .NET Security Group. You’ll also find practical resources on EF Core scaffolding, Minimal APIs, and Visual Studio performance tuning. Plus, we highlight how to upgrade your .NET AI chat app with the Microsoft Agent Framework to build smarter, tool-using agents that reason, plan, and act within your applications.
Take a look at today’s top picks:
➡️ Explore what’s new in .NET 10 RC2 and how it boosts performance and developer productivity
➡️ Get up to speed with the October 2025 .NET and .NET Framework updates for better security and stability
➡️ Read Andrew Lock’s guide on adding metadata to fallback endpoints in ASP.NET Core
➡️ Follow Nick Chapsas as he builds web APIs using Minimal APIs in .NET
➡️ Watch Ed Anderson explain Visual Studio 2026 performance and how to keep your IDE running smoothly
➡️ Watch Ed Andersen test if Visual Studio 2026 outperforms the classic 2008 edition
Keep reading, and when you’re done, drop us a note about what you enjoyed and how we can make the next edition more helpful.
Cheers!
Adrija Mitra
Editor-in-Chief
Missed Our Last Two Special Issues?
Parts 1 and 2 of our ongoing special series, Partial Types and Members: Breaking Apart and Reassembling C# Classes with Mark J. Price, are live now!
Don’t worry if you missed them — we’ve got you covered! Check out [Part 1] and [Part 2].
📰 What’s Happening in .NET!
The latest .NET breakthroughs are here. Haven’t explored them yet? Dive in now!
➡️ .NET 10 RC2 is here!: The second release candidate for .NET 10 just dropped, and it’s packed with performance boosts, smarter tooling, and some exciting C# updates. If you’ve been following the previews, this is your last stop before the official launch.
➡️ October 2025 .NET and .NET Framework Updates: The latest servicing updates for .NET and .NET Framework are out, bringing important security and reliability fixes. It’s a good time to make sure your apps are up to date and running smoothly.
➡️ Introducing the .NET Security Group: Microsoft has announced the new .NET Security Group, focused on strengthening the ecosystem and driving better collaboration around security practices. This initiative aims to help you build safer, more resilient applications while staying ahead of emerging threats.
➡️ Announcing Sponsorship on NuGet.org: Microsoft has introduced a new sponsorship feature on NuGet.org, allowing developers to support the maintainers behind their favorite .NET packages. It’s a meaningful way to give back to the community and help sustain open-source development.
🗣️ .NET Conference 2025
Here’s a look at what each day of .NET Conference 2025 has in store for you:
🗓️ November 11 | 8 AM – 5 PM PST
Kick off the conference with the big reveal: .NET 10! Join the .NET team as they showcase everything new and exciting in the latest release.
🗓️ November 12 | 9 AM – 5 PM PST
Day two takes you deeper into the world of .NET, Azure, and AI, exploring how these technologies come together to build smarter, faster, and more connected solutions.
🗓️ November 13 | 5 AM – 5 PM PST
Wrap up with the .NET community day, featuring inspiring talks and sessions from developers and experts around the globe.
⏱️ Time for Some Hands-On .NET
Don’t miss this edition’s spotlight tutorial!
In this guide, Bruno Capuano shows how to take a standard .NET AI chat app and upgrade it into a full agent system using the new Microsoft Agent Framework. You will understand how to add reasoning, tool use, and multi-agent orchestration while keeping your familiar .NET patterns like dependency injection, middleware, and telemetry. This guide walks through setup with .NET Aspire, Azure OpenAI integration, and best practices for building smarter, more autonomous AI apps.
How does this guide help you?
This guide walks you through upgrading a basic AI chat app into a more advanced, agent-driven system using the Microsoft Agent Framework. You’ll learn how to add reasoning, decision-making, tool use, and multi-agent orchestration, while keeping familiar .NET patterns like dependency injection, middleware, and telemetry. It’s a practical way to understand how .NET developers can build smarter, context-aware AI apps.
What do you need before diving in?
.NET 9 SDK installed
Visual Studio or Visual Studio Code with the C# Dev Kit
Access to Azure OpenAI or GitHub Models
.NET AI App Templates installed
Basic familiarity with .NET, Blazor, and general AI concepts
Understanding this guide will help build a solid next step for anyone looking to bring real AI capability into their .NET applications.
Missed Parts 1 and 2 of our ongoing special series Partial Types and Members: Breaking Apart and Reassembling C# Classes with Mark J. Price?
Don’t worry, we’ve got you covered! Check out [Part 1] and [Part 2].
🧑🏼💻 What .NET Experts Are Talking About
Inside the minds of .NET pros: Real-world experience, real insights!
➡️ Adding Metadata to Fallback Endpoints in ASP.NET Core: In his latest deep dive, Andrew Lock breaks down how to add metadata to fallback endpoints in ASP.NET Core; a handy trick when working with routing and endpoint customization. This is a practical read for anyone looking to fine-tune their app’s behavior.
➡️ Building Microservices with .NET Aspire: In this video, Milan Jovanović will show how to design a microservices architecture from scratch using .NET Aspire. He will also show how Aspire helps keep configurations consistent, adds observability, and simplifies local development. A solid starting point if you want to see how .NET Aspire brings microservices together end to end.
➡️ Scaffolding your DbContext with EF Core: In this video, Milan Jovanović walks through how to scaffold a DbContext and entity models from an existing PostgreSQL database using .NET 9 + EF Core. It’s very hands-on and ideal if you’re working with a legacy schema or starting from an existing database.
➡️ Building Web APIs with Minimal APIs in .NET: In this video, Nick Chapsas explains how to build web APIs using minimal APIs in .NET. He covers setup, routing, and best practices to help you create lightweight and efficient endpoints.
➡️ Visual Studio 2026 performance explained: In this video, Ed Anderson addresses concerns about Visual Studio 2026 performance, compares VM and native runs, shares hardware context and benchmarks, and offers practical tips to keep the IDE responsive.
➡️ Windows 11 update breaks .NET MAUI projects built on .NET 8: In this article, David Ramel explains how a recent Windows 11 update disrupted .NET MAUI projects built on .NET 8. He shares developer Jeff Rush’s experience, Microsoft’s response, and practical steps to restore builds. A quick read for anyone maintaining MAUI apps or planning to move to .NET 9.
➡️ Building employee onboard tracker using .NET MAUI DataGrid: In this guide, Jayaleshwari N walks you through building a complete employee onboarding tracker using the .NET MAUI DataGrid. She will show how to display, organize, and manage employee data efficiently with features like sorting, filtering, and searching. She will also show how to customize the grid layout for a clean, user-friendly interface that works across platforms.
Missed Parts 1 and 2 of our ongoing special series Partial Types and Members: Breaking Apart and Reassembling C# Classes with Mark J. Price?
Don’t worry, we’ve got you covered! Check out [Part 1] and [Part 2].
And That’s a Wrap 🎬
Thanks for diving in. I hope this issue sparked an idea or two that could help fuel your next big project.
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Keep learning, keep building, and we’ll see you next time!