@Tndata

I teach developers how to build smart, secure and scalable systems focusing on .NET/C#, architecture, DDD/CQRS, web security, and OpenID connect. Microsoft MVP

 Helsingborg, Sweden
tn-data.se
Joined September 2009
  • Tweets1.9K
  • Following267
  • Followers479
133Media
Many developers treat OpenID Connect as a black box until something breaks. My second Dometrain course is live. It breaks apart the flows, JWTs, token signing and PKCE. Thanks @nickchapsas and @dometrain dometrain.com/course/getting… #OpenIDConnect #OAuth #OIDC #Dometrain #MVPBuzz
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Happy to share that I've been renewed as a Microsoft MVP in .NET for a second year! 🎉 A big thank you to everyone in the .NET community for all the great conversations, questions, opportunities to share knowledge. That's what makes this journey so rewarding. #MVPBuzz #dotnet
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I'm super happy to announce that, after 4 months working on it, my course Mastering C# is now live on Dometrain! The internals of records, structs, classes, union types, pattern matching, LINQ and much more: all covered in 3+ hours of advanced content. If you love to understand the internals, this course is definitely for you. #dotnet #csharp
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My first video course is live: Getting Started with Authentication & Authorization in .NET A 12+ hour deep dive into how auth really works in ASPNET Core. Huge thanks to @nickchapsas and @dometrain! dometrain.com/course/getting… #dotnet #aspnetcore #dometrain #mvpbuzz
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When Claude Code talks to an MCP server, what is it actually saying? Until now, that conversation was invisible. New post: Visualizing Claude Code MCP Requests with the Coding Agent Explorer (.NET) nestenius.se/ai/visualizing-… #ClaudeCode #MCP @aspnetcore_news #mvpbuzz #dotnet
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Exploring Claude Code Hooks with the Coding Agent Explorer (.NET) by @tndata nestenius.se/ai/exploring-cl… #aspnetcore
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After my last post, people asked: What is Claude Code actually doing? Part 2 is out: Claude Code Hooks 🔍 Intercept file access, commands, permissions and tool usage, Enforce rules. Block secrets. See everything nestenius.se/ai/exploring-cl… @aspnetcore_news @claudeai #claudecode
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Do you know what happens between your prompt and ClaudeCode? I didn’t. So I built it. Coding Agent Explorer (.NET). A reverse proxy + live dashboard showing every LLM call, tool use, and token flow in real time. nestenius.se/ai/introducing-… @aspnetcore_news @claudeai #claudecode
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Tore Nestenius retweeted
Beauty in Code@beautyincodeFeb 11
We are proud to present that Dave Farley (@davefarley77) is coming to Beauty in Code in Malmö, March 7th. Read more about the conference and sign up here: beautyincode.se Looking forward to seeing you at Beauty in Code!
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This week's ASP .NET Core newsletter is out! This week by @tndata, @stevejgordon, @maartenballiauw, @cwoodruff, and more ❤️ Check out 'Past newsletters' here: aspnetcore.news/

ASP.NET Core News - Your weekly update of everything ASP.NET Core

ASP.NET Core News is the only weekly newsletter dedicated to ASP.NET Core. Whether you build Razor Pages, MVC applications, Web APIs, Blazor, SignalR awesomeness, or anything else available on the...

aspnetcore.news
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Duende IdentityServer 7: A Complete Setup Guide for ASP .NET Core by @Tndata nestenius.se/net/duende-iden… #aspnetcore
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Duende IdentityServer 7.4.4 from scratch in ASP.NET Core 10 Templates are great until something breaks. I built IdentityServer from an empty project, explaining every piece along the way. nestenius.se/net/duende-iden… #MVPBuzz @aspnetcore_news @DuendeIdentity
New blog post: Duende IdentityServer 7.4.4 from scratch in ASP.NET Core 10

ALT New blog post: Duende IdentityServer 7.4.4 from scratch in ASP.NET Core 10

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Meet Duende IdentityServer v7.4! 🎉 Now with full .NET 10 LTS compatibility and the standards-based foundation for Agentic AI systems and MCP. Get the details & join the Insiders! ➡️ duende.link/is74b0t #dotnet #security #ai #identity #MCP

Duende Software

Duende Software is a company that builds industry-leading security software.

duendesoftware.com
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Last week's livestream with .NET MVP Tore Nestenius is now available on YouTube. Demystifying Authentication in #aspnetcore Core Take a hands-on deep dive into the world of authentication. youtube.com/watch?v=8tZQGJIP… #dotnet #security #identity
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Check out our upcoming livestream with Tore Nestenius. We'll clarify how authentication in #aspnetcore works, including key concepts like schemas, handlers, ClaimsPrincipal, and more. 📅 September 18, 2025 🕐 10:00 EST / 16:00 CEST duendesoftware.com/webinars/… #dotnet #security
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Tore Nestenius retweeted
Jonah Andersson
@cjkodare12 Sep 2025
We are hosting another virtual event at @AzugSweden this month and it will be about helping and guiding you to learn and pass the AZ-204, Microsoft Certified: Azure Developer Associate Exam 🌟 Are you someone or a developer preparing get certified for it? Join me and @agrevlis, as we host and welcome our guest speaker, fellow Microsoft MVP @Tndata Tore at our user group community to share about passing the AZ-204 Azure Developer Certification the Hard Way ⏰ Sat, Sep 20, 2025 at 12:00 CEST 🎥 Virtual, Free Register lnkd.in/d55q36fn #mvpbuzz #mctbuzz #azugsweden #AZ204 #azuredeveloper #azuretechgroup
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Excited to share my AZ-204 journey and the open-source project that came out of it. Join us! #azure #mvpbuzz
Jonah Andersson
@cjkodare12 Sep 2025
We are hosting another virtual event at @AzugSweden this month and it will be about helping and guiding you to learn and pass the AZ-204, Microsoft Certified: Azure Developer Associate Exam 🌟 Are you someone or a developer preparing get certified for it? Join me and @agrevlis, as we host and welcome our guest speaker, fellow Microsoft MVP @Tndata Tore at our user group community to share about passing the AZ-204 Azure Developer Certification the Hard Way ⏰ Sat, Sep 20, 2025 at 12:00 CEST 🎥 Virtual, Free Register lnkd.in/d55q36fn #mvpbuzz #mctbuzz #azugsweden #AZ204 #azuredeveloper #azuretechgroup
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We'll host a livestream with Tore Nestenius! 📹 Authentication has many concepts and moving parts. In this session, we'll clarify how authentication in #aspnetcore works. 📅 September 18, 2025 🕐 10:00 EST / 16:00 CEST duendesoftware.com/webinars/… #dotnet #security

Demystifying Authentication in ASP.NET Core

Duende Software is a company that builds industry-leading security software.

duendesoftware.com
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This week's ASP .NET Core newsletter is out! This week by @dotnet, @damien_bod, @joshibipin, @alihamzaansar16, @buddhist_ptaman, @assiszang, @tndata, @aramt87, @chbernasconic, and more ❤️ Check out 'Past newsletters' here: aspnetcore.news/

ASP.NET Core News - Your weekly update of everything ASP.NET Core

ASP.NET Core News is the only weekly newsletter dedicated to ASP.NET Core. Whether you build Razor Pages, MVC applications, Web APIs, Blazor, SignalR awesomeness, or anything else available on the...

aspnetcore.news
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We'll host a livestream with Tore Nestenius! 📹 Authentication has many concepts and moving parts. In this session, we'll clarify how authentication in #aspnetcore works. 📅 September 18, 2025 🕐 10:00 EST / 16:00 CEST duendesoftware.com/webinars/… #dotnet #security
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