API breaking changes happen when you expose implementation details. Learn how treating your API as a contract lets your internals evolve independently.

Hosting an endpoint with the Microsoft Generic Host.

Why check-then-act idempotency fails under concurrency, and how to fix it with unique constraints, atomic upserts, and optimistic concurrency.

If it walks like a duck and it quacks like a duck - it is a duck. So duck it and make that work in C# thanks to interceptors!

Connect endpoints in a system that use different transports with the messaging bridge.

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

Anyone with a cable or DSL modem knows how temperamental network connections can be. The Internet just stops working, and the only way to get it going again is to unplug it for 15 seconds. (Or, put…

Interoperability is painful. Around 2005 or 2006, it wasn’t so bad. Most of the code running on the planet, at least the code that mattered, was written in .NET or Java, and interoperability via web…

There are a myriad of security-obsessed organizations scattered throughout the world that take security concerns to the verge of paranoia. In one such organization I’ve heard of, there existed two…

Property-based testing is a powerful alternative to example-based testing. Instead of defining specific inputs and verifying their outcomes, you define properties that should always hold true. Let’s learn how to use FsCheck to write property-based tests in C# with NUnit.

TL;DR: Most workflows are better off accepting out-of-order delivery and modeling the business process to cope with it. If strict order is a real requirement, however, Azure Service Bus sessions are only the start. A delayed retry can let later messages overtake the failure. Preserving processing order then requires a hold-back that records the failed...

The Particular Docs MCP Server is a Model Context Protocol server that adds up-to-date documentation as context to language models.

I wrote about this back in the days of .NET Core 2.0. How to do this has changed in .NET 10.

When the Romans met the Gauls for the first time, they couldn’t talk to each other. The Romans spoke Latin, and Gauls a Celtic language. How could they communicate? It must have been difficult to…

Some time ago, Jeff Langr and I came up with seven virtues for code in Agile in a Flash , and we wrote more about them over the years.  The...

In this post I provide an introduction to Device Bound Session Credentials, I look at how DBSC protects against session hijacking, and how the protocol works

What does a good SQL index look like? I seeded Postgres with 1 million comments and measured every indexing decision with EXPLAIN ANALYZE: a 17ms sequential…

🔗Transcription 00:05 Dennis van der Stelt So welcome. Let's talk about autonomous services that don't share any data. And I added period because I strongly believe they shouldn't. But what kind of…

How to consume messages published by non-NServiceBus endpoints.

How to relay NServiceBus events to occasionally-connected clients via SignalR.

Ten practical, in-order techniques for cutting .NET pod memory usage in Kubernetes — GC tuning, EF Core, container images, and pod sizing — plus how to load test the changes locally and what's different in .NET 9 and .NET 10.

🔗Transcription 00:05 Indu Alagarsamy What I'm going to talk today, this talk is going to be, is requirements are going to be changing all the time and how can we keep up with those requirement…

When a distributed application feels slow, the user sees one delay. The code behind that delay may run across a web frontend, backend services, databases,

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