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Creating a memory dump in C# (opens on the source site)
Learn how to create a memory dump in C# to capture the state of your application for debugging purposes. The post Creating a memory dump in C# appeared first on .NET Blog.
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Build Your Own AI Agent Harness in C#, the MafClaw Live Series (opens on the source site)
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. The post Build Your Own AI Agent Harness in C#, the MafClaw Live Series appeared first on .NET Blog.
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Use C# unions and closed hierarchies in ASP.NET Core (opens on the source site)
Learn how C# unions and closed hierarchies work with System.Text.Json across ASP.NET Core Minimal APIs, MVC, SignalR, Blazor, and OpenAPI. The post Use C# unions and closed hierarchies in ASP.NET Core appeared first on .NET Blog.
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Announcing .NET 11 Release Candidate 1 (opens on the source site)
.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. The post Announcing .NET 11 Release Candidate 1 appeared first on .NET Blog.
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Explore new features available in C# 15 preview (opens on the source site)
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. The post Explore new features available in C# 15 preview appeared first on .NET Blog.
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Routing and Failover for Microsoft.Extensions.AI (opens on the source site)
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. The post Routing and Failover for Microsoft.Extensions.AI appeared first on .NET Blog.
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Instructions Hygiene – What Frontier Models Still Need You to Say (opens on the source site)
Get the most out of the latest models by providing the right level of instructions The post Instructions Hygiene – What Frontier Models Still Need You to Say appeared first on .NET Blog.
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Test reporting in Microsoft.Testing.Platform: from red build to root cause (opens on the source site)
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. The post Test reporting in Microsoft.Testing.Platform: from red build to root cause appeared first on .NET Blog.
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Forking an open source project (opens on the source site)
Introduction and motivation Some of the projects I work on – notably V-Drum Explorer and At Your Service – use MIDI to interact with hardware devices. I use a couple of packages for this depending on the nature of the interaction, but the one I use most often is managed-midi, which currently has its “source … Continue reading Forking an open source project →
c#excerpt only · body stays at the source
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Changing Immutable Collections (opens on the source site)
As I’ve written before, I’m leaning heavily into immutability in the election site code. Until September 2025 (it’s taken a long time to get round to writing this blog post) that meant a combination of records, ImmutableList and ImmutableDictionary. In an ECMA C# standards meeting, however, Joseph Musser passed on some really valuable feedback … Continue reading Changing Immutable Collections →
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A Modern Guide to Using OAuth 2.0 with C# and Visual Studio Code (opens on the source site)
Master OAuth 2.0 in .NET 9.0! This tutorial covers using OAuth 2 to acquire tokens and access Microsoft Graph user data.
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Records and the ‘with’ operator, redux (opens on the source site)
In my previous blog post I described some behaviour of C# record types which was unexpected to me, though entirely correct according to the documentation. This is a follow-up post to that one, so if you haven’t read that one yet, please do so – I won’t go over all the same ground. Is this … Continue reading Records and the ‘with’ operator, redux →
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Unexpected inconsistency in records (opens on the source site)
Unexpected inconsistency in records The other day, I was trying to figure out a bug in my code, and it turned out to be a misunderstanding on my part as to how C# records work. It’s entirely possible that I’m the only one who expected them to work in the way that I did, but … Continue reading Unexpected inconsistency in records →
c#excerpt only · body stays at the source
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Election 2029: Postcodes (opens on the source site)
Postcodes After a pretty practical previous post about records and collections, this post is less likely to give anyone ideas about how they might tackle a problem in their own project, and doesn’t have any feature requests for Microsoft either. It’s an area I’ve found really fun though. An introduction to postcodes in the UK … Continue reading Election 2029: Postcodes →
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Records and Collections (opens on the source site)
Records and Collections This post is to some extent a grab-bag of points of friction I’ve encountered when using records and collections within the election site. Records recap This may end up being the most generally useful blog post in this series. Although records have been in C# since version 10, I haven’t used them … Continue reading Records and Collections →
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