YouTube video by globalglob-dev

Turn an Azure workload identity into an OAuth client identity at runtime. Protect the Duende IdentityServer DCR endpoint with Microsoft Entra ID and let workloads register themselves without stored se...

You can use passkeys as a second factor after password login in ASP.NET Core Identity on .NET 10. Register a two-factor token provider for users who have a passkey, then add two endpoints: one creates...

YouTube video by Duende Software

A session cookie is a bearer token, which is a polite way of saying that whoever holds it is you. Copy the cookie, replay it from another machine, and the server happily serves your account. Nothing a...

Tuesday, 29 September 2026 • 18:00 • ODS Belgium B.V., Peepolderlaan 23, 2910 Essen

This issue includes bits of AI, Security, MS SQL, Performance, C#, HTTP and of course .NET and .NET Internals.

Sometimes you just want a simple way to look at your traces, metrics, and logs without setting up a full observability stack. Just a UI where you can see what your applications are doing, without havi...

You have an IMessageSender interface, with two implementations: EmailMessageSender and SmsMessageSender. You register both, and now the question is which one gets injected into your OrderConfirmationS...

This plugin provides support for TRX test report files in JetBrains Rider. It allows importing TRX files as unit test sessions, making it easier to work with test...

For as long as I can remember, I’ve been writing non-fiction. Blog posts, documentation, technical guides, a couple of books about NuGet, and ASP.NET MVC 1.0 which still sells one copy per quarter, am...

DateTime.Now is one of those calls that looks harmless until you try to write a test around it. It’s a static property that reads the system clock, and there’s no way to control what it returns withou...

The Side Project by Maarten Balliauw

The Side Project by Maarten Balliauw

Back in 2023, I wrote about discriminated unions in C# and how C# developers had to work around the lack of language support using things like ASP.NET Core’s Results<> type or the OneOf NuGet pac...

Earlier this week at Duende Software, we had a prospect reach out that wanted to implement IdentityServer in their solution. Their application consisted of one ASP.NET Core application with local user...

Calling all developers, coders, and AI enthusiasts!

YouTube video by Duende Software

Announcing Duende Agent Skills and the Duende Documentation MCP Server. Two tools that give AI coding assistants deep knowledge of IdentityServer, BFF, and identity protocols.