Egil Hansen

If you find my work in the #dotnet open-source community useful and you (or your company) would like to support my efforts, doing so through GitHub Sponsors is an excellent choice. Learn more here: github.com/sponsors/egil

We’re launching Chameleon UI components for Web/JS, React and Blazor. Angular, Vue and Svelte are coming in February. #Blazor #ReactJS chameleonui.io/blog-entries...

This is quickly becoming a hill I'm willing to die on. Just because something is created with AI, it does not make it slop or bad quality or a waste of somebody else's time. AI is a tool and if you use it well, you can create high-quality stuff much faster than without.

Data models evolve, but the old JSON payloads don't just disappear. They sit in databases and queues or keep arriving over the wire from old clients. Wrote a post on how to handle evolving C# types and data at rest without the headache: egilhansen.com/2026/06/11/e... #dotnet

A trick for making @simoncropp.bsky.social’s Verify play nice with AI agents: egilhansen.com/2026/05/05/v...

This video does a great job covering the good and bad sides of open source software. The researcher from Microsoft gets a lot praise for discovering the hack, but the real hero is the sole developer from Finland who has been supporting the XZ library for free for 20 years: youtu.be/aoag03mSuXQ?...

Thanks Stacy.

Want more of this? Back in October, I did a presentation on this exact topic at @hellostavanger and it covers a bunch of extra details and examples we didn’t get to in the podcast: youtu.be/yT1ckNTCW60?...

You write tests. But are they helping you and your team? In this .NET Rocks! episode, @egilhansen.com explores how to make tests more durable, insightful, and future-proof. Plus: should AI be writing your tests? 🤖 #dotnet 🎧 Listen here: msft.it/63323sFo2T

@simoncropp.bsky.social do you have a list of does and donts in snapshot testing somewhere? Examples of good patterns and anti patterns with Verify?

If the facts are as the article lays them out, I hope one of my friends from #microsoft will make this right. Adherence to OSS licenses is important! philiplaine.com/posts/gettin...

Yep, saw this live. Huge respect for people that dare to be vulnerable; it’s such a powerful thing.

Need a cure for that primitive obsession in #dotnet? Take a look at www.nuget.org/packages/Egi... First real attempt at a source generator library. Happy with the result. A key feature is that it’s very easy to overwrite the default generated code, just as it is with C# record classes and structs.

Going live with @steven-giesel.com for the first #bUnit dev session of this month. We may even get a visit from @scottsauber.com :) Join at twitch.tv/egilhansen and www.youtube.com/watch?v=jZrZ...

This could be said about the internet in general.

Hey folks, @steven-giesel.com and I just went live with another #bunit dev session. Come hang and lets build v2 together. www.youtube.com/watch?v=fvBn... and twitch.tv/egilhansen

@captainsafia.com does (or will) #dotnet's OpenApi generator have a way to declare a custom schema transformer for type as an attribute, like we can with JsonConverter? E.g.: [OpenApiTransformer<MyIdSchemaTransformer>()] public record MyId(int Value);

For all the Open Source Maintainers, a message to the world.

I like the way Rob phrases this, software is free, maintainers time is NOT. I’ll consider this for new projects going forward.

Hey #dotnet, #blazor, and #bunit friends, me and @steven-giesel.com are live with another bUnit dev session. Come join us on www.youtube.com/watch?v=Nw68... and twitch.tv/egilhansen.

A solid analysis by @anderspucknielsen.dk cutting through the media buzz created by Trump and co and providing a reasonable assessment. www.youtube.com/watch?v=TWLq...

Another excellent rendition of the #swetugg conference is in the bag. Really great conference; food, venue, organizers, and sessions were all top notch. Big recommendation from me!

Hey @stevejgordon.bsky.social, we chatted about OTel telemetry aggregation at NDC London. You mentioned you have a processor that does this, and that you could share it. Consider yourself nerd sniped :)

Any .NET devs from Japan in my network?

Ok I think 1100 tests are enough for now. FusionCache v2 is right around the corner 😬

Spot on @aaronontheweb.bsky.social, well written: aaronstannard.com/relicense-or...

Going live with @steven-giesel.com in a couple of minutes for another #bUnit dev session. Come hang and help us build v2. Watch at: - www.youtube.com/watch?v=m_GM... - twitch.tv/egilhansen

I can't believe @anderspuck.bsky.social got through his Greenland explainer with a straight face. Strange days again. Prolly stranger. youtu.be/GlK3f1cs_l4

Starting a new Azure project at work and was reminded how long it takes to develop IaC scripts (bicep). The developer-inner-loop is soooo slow, test running the scripts takes minutes, especially when provisioning resources that involve vnets or other networking resources. Tips are welcome!

@anderspuck.bsky.social you mention in a recent video that Russia is not after land, but after direct and indirect influence/control over Ukraine, like it seemingly has over Belarus. That makes sense to me. A, perhaps stupid, next question I have is “why?”

Come join!

Driving home after Christmas from Akureyri to Reykjavik in Iceland with icy but beautiful mountain crossings is hard to complain about.

For the longest time I saw the hand in the 🫡 emoji as a long nose, aka a Pinocchio reference, which at times caused confusion 😆

This triggers me. Troy posts a link to a tweet by somebody other than him on X, folks then demand he makes the content of the tweet thread available to them here because they don't want to go to X or sign in to X 🤦 Don't want to be on X, fine, that's a YOU problem. Not a Troy problem.

So it seems #blazor has entered the big leagues. Apparently used by a certain adult website for “age verification pages” in US states that requires such a thing. www.reddit.com/r/Blazor/s/7...