Blogged: Discriminated unions in #csharp and #dotnet 11 (for real this time) blog.maartenballiauw.be/posts/2026-0...

Blogged: What is IdentityServer and When Do You Need it? blog.maartenballiauw.be/posts/2026-0... #dotnet

Speaker desk with adjustable height. Love it @updateconference.bsky.social ! ❤️ #dotnet

Why is all software going to shits these days

Developer Ecosystem Survey 2026 - surveys.jetbrains.com/s3/jbc-devel...

This new pricing tier is fantastic

Started our stream with @anders.abel.nu and @programmeral.com - First look at SAML in IdentityServer www.youtube.com/watch?v=o_tG... #dotnet

Enjoyed working on this - duendesoftware.com/blog/2026040... Our docs, blog and samples repackaged for consumption when using AI tools. Skills benchmarked as well. Check these out if you are doing any #dotnet #aspnetcore identity work!

Going Passwordless - A Practical Guide to Passkeys in ASP .NET Core by @maartenballiauw.be www.youtube.com/watch?v=-BV2... #aspnetcore

2 intense meeting days and feeling like it's Friday. It's not 😅

Going live with @gotsharp.be - Are you sure your access tokens are really secure? www.youtube.com/watch?v=j_P4... #dotnet #identity

Doing one of those online security awareness trainings and seeing an older @nickchapsas.com in one of the videos.

Eating poutine, and there's Justin Bieber music in the background. How much more Canada can I get.

In-flight wifi on Swiss can go die in the tire fire it is.

I am at loss how public holidays in the US work. Seems more business as usual. Take the time off folks!

Submitted 2 security issues to NuGet and GitHub last year, finally heard back that they are low priority and not a big deal. I did manage to publish this package to NuGet. A bunch of unicode in there, but it looks genuine, right? Nobody would discover this via search because of the unicode.

Submitted 2 security issues to NuGet and GitHub last year, finally heard back that they are low priority and not a big deal. I did manage to publish this package to NuGet. A bunch of unicode in there, but it looks genuine, right? Nobody would discover this via search because of the unicode.

Going Passwordless - A Practical Guide to Passkeys in ASP .NET Core by @maartenballiauw.be www.youtube.com/watch?v=P7eb... #aspnetcore

Trying to login to London's TfL Go app to look at underground maps and relink my card. If only the 2FA text message would be delivered (4 days and counting) 2FA via text messages is a usability problem. (Visit my talk at @ndcconferences.com London for an alternative: passkeys!) #dotnet

Recording of my talk on passkeys in #aspnetcore at NDC Copenhagen is up! #dotnet Also includes a pointer on how to add passkeys to Razor Pages for folks who aren't on the #Blazor train. www.youtube.com/watch?v=P7eb... #dotnet

Writing documentation tends to be pushed to the bottom of the todo list. With C# we got XML comments that promised automatic reference documentation, but it's rarely used and it provides no solution for high level docs. What would your dream solution look like? (I might be working on something).

If you're leveraging BFF v4, take 20 minutes to rewatch Erwin van der Valk's talk on Token Management and securing your backend-for-frontend implementations. This is the best pattern for modern single-page application (SPA) security. Available now: 📺 📺 www.youtube.com/watch?v=6zMS...

Introducing pkgstore - a #dotnet commercial nuget package market place www.pkgstore.io/news/introdu...

ReSharper and Rider 2025.3 release party is incoming! 😃 📅 December 9, Tue, 4pm UTC 🗣️ Our .NET Advocates and @auduchinok.bsky.social 🎁 Lots of new features! 🤔 Bring all your questions! #dotnet #devtools #ai #csharp #fsharp #ama

Worked on a good longread: simplify your identity mess! Learn how a Federation Gateway orchestrates all your IdPs (Entra ID, Google, SAML). Must-read architecture deep dive! duende.link/8aefizq #IdentityOrchestration #SSO #Security #dotnet

With the .NET 10 LTS released, now is the time to look into upgrading #IdentityServer4 to Duende IdentityServer! Fix known vulnerabilities and future-proof your security. Get support, FAPI 2.0 compliance, and more. duende.link/uwo974g #IdentityServer4 #OAuth2 #OpenIDConnect #dotnet

Time for #dotnet Conf - passkeys! www.youtube.com/watch?v=U4_K...

Colleague Khalid opened a nice discussion topic - "Upgraded to .NET 10? Share Your Experience!" github.com/orgs/DuendeS... Curious to read how the upgrade goes for everyone! #dotnet

Finally, #dotnet 10 is here! Here are the new capabilities and features we are excited about. Expect passkeys, #opentelemetry additions,TLS for *.localhost, and more. 👀 duende.link/qet4wp9 #aspnetcore

Congratulations Microsoft with the #dotnet 10 release! devblogs.microsoft.com/dotnet/annou... Who's upgrading, when? (We're on it for our SDKs)

.NET 10 Breaking Changes To Keep An Eye On When Upgrading duendesoftware.com/blog/2025110...

The one thing I hate about parenting is how it confronts you with your own quirks.

Heads up, #dotnet developers! 🚀 .NET 10 is a great time to upgrade your application and its dependencies. In this post, we look at key .NET 10 breaking changes you need to know about for a smooth upgrade. 👉 duende.link/89qegla #aspnetcore

Say goodbye ✋ to passwords, and hello 👋 to secure, phishing-resistant logins: passkey credentials. Part 1 of our 4-part blog series covers password and authentication evolution 👀 duende.link/p455k3y #passkeys #webauthn #dotnet #security #aspnetcore

Claims and scopes describe user information in OpenID Connect. Let's see how Duende IdentityServer handles consent, different client types, required vs. optional scopes, and what happens when a client doesn't get everything it asked for. duende.link/97aeqlj 👀 #dotnet #aspnetcore

Adding .NET 10 Passkey Support to Duende IdentityServer 👉 duende.link/berqe86 Learn how to add #dotnet 10 passkey support to a non-Blazor project such as MVC or Razor Pages. #security #aspnetcore #identity #webauthn

Adding .NET 10 Passkey Support to Duende IdentityServer 👉 duende.link/berqe86 Learn how to add #dotnet 10 passkey support to a non-Blazor project such as MVC or Razor Pages. #security #aspnetcore #identity #webauthn

Final post in my .NET 10 passkey series! Adding .NET 10 Passkey Support to Duende IdentityServer 👉 duende.link/berqe86 Learn how to add #dotnet 10 passkey support to a non-Blazor project such as MVC or Razor Pages. #security #aspnetcore #identity #webauthn

Another .NET 10 passkeys post! The server's origin is used to generate passkey credentials. A credential signed for one app can't be used elsewhere. What about subdomains? Or multiple domains? I looked into it for you. duende.link/igeq87f #dotnet #security #passkeys #webauthn

Did not expect to be speaking in an igloo in Portugal... #AzureDevSummit #dotnet #htmx

Passkeys in .NET 10 Blazor Apps with ASP .NET Identity by @maartenballiauw.be duendesoftware.com/blog/2025100... #aspnetcore

Starting my talk on #dotnet 10 Passkeys in 5 minutes #AzureDevSummit

"We are boarding group B!" Sure, good to have none of that info on the PDF or wallet boarding pass. Chaos is fine. Queuing and hoping I don't get yelled at 🤷‍♂️

We're happy to start sponsoring the Spectre.Console project! It is a #dotnet library that makes it easier to create beautiful console applications by giving you access to standard components you may find in a CLI experience. Go check it out! duende.link/sp3ctr3

Going live here less than 10 minutes to talk about “Test Driven Development with Blazor” at @jetbrains.com .NET Days! Many people say you can't TDD frontends. They're wrong because I've done it for years. Find out how here: www.youtube.com/live/Srsnb7J...

Speaking at the @jetbrains.com #dotnet days online in 15 minutes. If you're interested to learn about #csharp nullability, now's the time to tune in! www.youtube.com/watch?v=Srsn...

The upcoming release of #dotnet 10 comes with built-in passkey support. Had good fun digging into the new #Blazor project template and how it adds secure authentication using passkeys. duende.link/37egw9f #aspnetcore

The upcoming release of #dotnet 10 comes with built-in passkey support. Had good fun digging into the new #Blazor project template and how it adds secure authentication using passkeys. duende.link/37egw9f #aspnetcore

It's a "brew coffee forgetting to put a cup under the nozzle" morning. Doh.

Say goodbye ✋ to passwords, and hello 👋 to secure, phishing-resistant logins: passkey credentials. Part 1 of our 4-part blog series covers password and authentication evolution. Longread ahead! 👀 duende.link/p455k3y #passkeys #webauthn #dotnet #security #aspnetcore