Mattias Karlsson

Sweet!

Win 1 of 17 .NET Conf Swag Bags loaded with over $5,500 in dev tools, premium licenses, and gift cards! Upgrade your stack on our dime. Enter the giveaway before Nov 13: hubs.li/Q04C7nQQ0

Join us November 10 - 13. to celebrate the launch of .NET 11 and learn what's new! 👉https://hubs.li/Q04C7d_G0

.NET has released an out of band security update to address the vulnerability in the Google Brotli library. This is the same library NPM and others use. .NET and ASP.NET Core do not use Brotli by default, you have to opt-in. Details on what to look for in your code are in the advisory.

Mixed feelings when the daughter couldn't sleep because of the storm and bakes at 06:30 AM, the dog can sleep through a storm, but not activity in the kitchen, which means I had to walk the dog in the rainy storm, but it also means I'm now at 8 AM having fresh-made coffee and a just-baked brownie🤣

A big part of the PHP fix was just one guy in Czechia, Ondřej Surý. What he had to say about it is worth a read www.theatlantic.com/technology/2...

Plan your Øredev with MySchedule! Did you know that you can create your own personal program on our website? All you need to do is check out the line-up or the program on the website, find the sessions you really don’t want to miss, and add them! 👉 https://www.youtube.com/watch?v=KZYwaYcXbAo

I need Schriebmann port like I need a hole in the head.

Only 2 weeks left, grab your ticket and join us at Øredev! It's almost time to meet the experts and be inspired by the latest in tech. You can look forward to 3 packed days where you'll sharpen your software skills, improve your craft & build your squad 👉 Oredev.org/tickets

I'll be at .NET Skåne Øredev meetup! See you there? #dotnet

I'll be at .NET Skåne Øredev meetup! See you there? #dotnet

Have you checked out the Øredev+ side events? Every year we encourage the local Malmö community and our partners to create their own side events during the Øredev week. There are still a few spots left to claim! 👉 https://oredev.org/oredev-plus

The way forward is to invest in people. It's been a tough time for our industry. But even in challenging times, supporting your team's growth isn't just a benefit. It's a responsibility. Learning, connecting and exchanging ideas matter. Invest in your people. Bring them to Øredev

Remember .NET 8 and .NET 9 EOL in ONE MONTH Move your code. There will be no more security patches after Nov 10th. dotnet.microsoft.com/en-us/platfo...

It's kinda cool that you can pipe C# directly into dotnet run since .NET 10, so you can easily use C# as an inline script. Here is a Cake.Sdk task handling AI: #dotnet #csharp

Starting the process to add net11.0 TFM to my NuGet packages, to learn and be ready by .NET 11 launch. Smoth sailing sofar. #dotnet

It's kinda cool that you can pipe C# directly into dotnet run since .NET 10, so you can easily use C# as an inline script. Here is a Cake.Sdk task handling AI: #dotnet #csharp

There’s something poetic about receiving an email from a company requesting permission to email you... ...because they lack my opt-in to get their emails.

Xogot's modeler ported to Windows

Ready for some Øredev+ side events? Every year we encourage the local Malmö community and our partners to create their own side events during the Øredev week. From hackathons to hang-outs, here’s the full list of side-quests for 2026! 👉 https://oredev.org/oredev-plus

RIP

Margaret Hamilton, who led the 100-person team that wrote the onboard software for the Apollo missions, guiding Neil Armstrong and Buzz Aldrin to a safe landing on the moon, died Sept. 30 in Cambridge, Mass. She was 90. 🧪 www.nytimes.com/2026/10/07/o...

New doc page added: Theory Data Attributes xunit.net/docs/getting... #DotNet #CSharp #UnitTest #TDD

podcasts.apple.com/br/podcast/n... #NowPlaying #PodCast #.NETRocks! -  Controlling your Digital Legacy

So I'm planning on shutting down the labeler and the bluesky.ms site. I have about 7 folks sponsoring the annual $10 contribution and I'll be reaching out to them to cancel. If anyone wants to take over and run the service please let me know. 2/2

Hey folks, important PSA for the Bluesky Microsoft community Do you find the @bluesky.ms labeller service valuable? It's costing me a bit to run (requires a VM) and right now I'm neither a Microsoft employee nor an MVP. Plus I now have a SaaS business to look after. 1/2

In open source, closing a decade old issue causes mixed feelings of a little guilt, but having decade old issue also means you've kept something alive for more than a decade 💡

Dew Drop Weekly Newsletter 502 - Week Ending October 2, 2026 buff.ly/aknyp4d #dewdrop #newsletter #javascript #azure #aspnetcore #aspire #blazor #cpp #windowsdev #xaml #csharp #dotnet #ai #mcp #python #appdev #dotnetmaui #podcasts #devops #agile #sqlserver #data #terminal #cli #powershell #m365

I wrote this for me; now you can read it too. It’s been in draft for years. I was recently a guest on the .NET Rocks podcast on the topic, that episode landed today, which made me revisit and finally get the post out of drafts: Taking control of your digital legacy www.devlead.se/posts/2026/2...

What happens to your digital assets after you die? @devlead.se joins .NET Rocks to talk about the practical realities of digital succession planning: email access, authenticators, GitHub maintainer roles, open-source projects, and more. Listen at www.dotnetrocks.com/details/2022

.NET Rocks! - Controlling your Digital Legacy with Mattias Karlsson and hosts Carl Franklin & Richard Campbell buff.ly/F1DwnWN #podcast #devcommunity #digitallegacy

I wrote this for me; now you can read it too. It’s been in draft for years. I was recently a guest on the .NET Rocks podcast on the topic, that episode landed today, which made me revisit and finally get the post out of drafts: Taking control of your digital legacy www.devlead.se/posts/2026/2...

ICYMI: Heads up for .NET Foundation members: in the first week of October you'll get an email from contact@dotnetfoundation.org asking you to activate your account on our new membership platform. Click the link and set a password. More here: dotnetfoundation.org/news-events/... #dotnet

I’ve had a blog post sitting in my drafts for a couple of years. I originally wrote it just for myself to process things, but I recently guested on a podcast about the topic. I might just revisit the draft and publish it so you can read it too when the podcast episode goes live.

I know what I will be doing tomorrow; upstream changes keep me on my toes...🤷

Not sure how useful it is yet, but parsing PageFind indexes in C# was a fun kata. Built a .NET MCP Server for AI agents to search PageFind indexes, locally or online. Demo: list indexes, search my blog & fetch page. Open source & on @nuget.org: www.nuget.org/packages/pfmcp #dotnet #mcp #pagefind

Not sure how useful it is yet, but parsing PageFind indexes in C# was a fun kata. Built a .NET MCP Server for AI agents to search PageFind indexes, locally or online. Demo: list indexes, search my blog & fetch page. Open source & on @nuget.org: www.nuget.org/packages/pfmcp #dotnet #mcp #pagefind

⚠️ Action required: Microsoft's NuGet author-signing certificate changes starting Sept 23, 2026. If you allow-list Microsoft in trustedSigners or use dotnet nuget verify with fingerprints, add the new cert now to avoid NU3034 install failures. devblogs.microsoft.com/dotnet/micro...

That wonderful feeling when you meet a deadline with room to spare, having been repeatedly asked for updates throughout the whole process, only to be met with total silence after you deliver.🤣😢😎

This 👇

Reminder ⏰ .NET 8 and .NET 9 support ends on November 10th. Get your apps moved to .NET 10 before then.

Cake v6.3.0 is out 🚀🍰 NuGetLogin for GitHub Actions OIDC trusted publishing (no long-lived API keys), nullability-aware aliases, typed dotnet tool aliases, verbosity via config, and light-theme-friendly reports. hubs.li/Q04xvj2B0 #dotnet #devops #csharp

Anyone consider themselves a #Blazor Consultant and would like to try out an experiment with me? Looking for a handful of professionals who like working with the technology. #dotnet

Cake v6.3.0 is out 🚀🍰 NuGetLogin for GitHub Actions OIDC trusted publishing (no long-lived API keys), nullability-aware aliases, typed dotnet tool aliases, verbosity via config, and light-theme-friendly reports. cakebuild.net/blog/2026/09... #dotnet #devops #csharp

One of my favorite .NET conferences, Swetugg, just opened its CFP for 2027! See you there? sessionize.com/swetugg-stoc... #dotnet #cfp

We are starting to prepare our next release, 6.3.0 ( github.com/cake-build/c... ). This is your friendly reminder that if you haven't pinned to a specific version of Cake, you should do it now :-) 📌 🍰 cakebuild.net/docs/writing...

Just about to cast my vote early in the Swedish elections! Even with a queue today, I love it. It’s a privilege to live in a country that lowers the bar to vote and where democratic outcomes are always respected, even if it's not the result you personally hoped for.

The number of cases of cervical cancer reported in Scotland among women given the HPV vaccine at 12-13 years of age is now zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. Zero. www.bbc.com/news/article...