Dennis Doomen

I watched “Star Wars: The Mandalorian and Grogu”in IMAX. Back in 2019, I had only seen the opening of The “Mandalorian” while examining the LED-shot “virtual production” technology, but this time I had no problem diving in. Action, car chases, close-quarters combat, sword fights, gun battles, death matches, aerial combat, giant monsters, giant mechs. A complete “everything versus everything” showcase. CGI, puppets, special makeup, animatronics, stop motion. Even the behind-the-scenes craftsmanship feels like it has everything packed in. X-Wings, AT-ATs, AT-RTs, speeders, stormtroopers, droids. Nearly every element from across the entire history of the Star Wars saga is in as well. An entertainment spectacle made with craftsmanlike skill by Jon Favreau.

@kzu @maddymontaquila @timheuer @nuget That's a really nice trick. Decided to add this to Mockly so the agent learns how to best do HTTP mocking. See github.com/dennisdoomen/m…. Thanks for the tip @sandertenbrinke

@maddymontaquila Expect them.... Sigh... I got the idea from @timheuer after I complained that @nuget should do this themselves x.com/timheuer/statu…

Adding a SKILL.md to your nuget package can make all the difference to a newcomer who's trying to learn how to use it 😻 nuget.org/packages/Struc…

@marcjacobi That's deep Marc ☺️

@ddoomen Every rose has its thorns. Every codebase has its boundaries.

Every codebase has boundaries. Inside a boundary, share abstractions freely. Across boundaries, use explicit contracts. Rule of thumb: “If this were a separate deployable unit, would this dependency still make sense?” Good boundaries reduce coupling. #dotnet #csharp

I’ve refreshed csharpcodingguidelines.com with new General Guidelines, a dedicated Testability section, updated modern C# guidance, and a rule for AI-generated code: use it if it helps, but own every line. See github.com/dennisdoomen/C…

⚔️ Last week at Techorama Belgium, I took over room 6 at Kinepolis Antwerp talking about building HTTP APIs in .NET! Covered: responsibility levels, versioning, OpenAPI docs, error/success codes, async APIs, minimal API & more. So much devs often overlook here. 🧵

Cooking up something new 🧑‍🍳 Join the waitlist for early access to technical preview of the GitHub Copilot app 👇 gh.io/github-copilot…

It's finally here! Process API Improvements in .NET 11 devblogs.microsoft.com/dotnet/process…

#UCK26 | From building properly versioned and well-documented HTTP APIs in ASP.NET Core to practical ways of keeping large C# projects maintainable, @ddoomen will share approaches, tools and engineering practices that help teams stay in control as products evolve. Expect practical insights into API design, OpenAPI, versioning strategies, .editorconfig, SonarCloud, NUKE pipelines, code quality and sustainable architecture decisions. 🎤 Learn more about the sessions: krakow.updateconf.net 💻 Watch live: now.updateconference.net 📍 27–28 May 2026, Krakow 🎟️ Want 10% off? Use discount code: DennisDoomen10 See you all in Krakow #UpdateConference #UpdateConferenceKrakow #dotnet #architecture #cleancode #aspnetcore #apidesign

@islamgshehata @CodeWithAmann Definitely not Java, because of Oracle

@CodeWithAmann Definitely not .Net because Microsoft

Which backend stack has the strongest future?

@edfazolo @CodeWithAmann .NET 6+ has nothing to do with Windows.

@CodeWithAmann node, by far Java should have died 2 decades ago .net will die because Microsoft will nosedive windows into oblivion Go is niche

What do you use for mocking HTTP requests in unit tests? Have you tried github.com/dennisdoomen/m… already? Try it and share your opinions here.

🎤 Speaking at Techorama Belgium again! I'll share what I've learned about building professional HTTP APIs in .NET — API design, HTTP error codes, async APIs, caching, versioning, contract design, concurrency & OpenAPI. Will I see you there? #Techorama #dotnet

The amount of bugs caused by developers not thinking hard enough about and documenting whether a string can be null or empty, a DateTime is local or UTC, or implicit conversions to/from DateTimeOffset is truly staggering....

Also had an epic traditional Cretan dinner with the DDD Greece community alongside @icooper and @jbrains. "Stuffed" doesn't even cover it 😁 Thanks @ppapapetrou and the whole crew for an amazing event! (2/2)

Just got back from my first @DevoxxGR in Athens! 🇬🇷 Spoke to a packed room about the real pros & cons of #EventSourcing, co-hosted a mentoring session on career & personal branding with @jominney — nearly 50 people showed up! 🤯 (1/2)

Tomorrow, I'll travel to Athens to attend my first Devoxx Greece conference ever. On Thursday, at 10:55, I'll provide an introduction to Event Sourcing and share my experiences after having used this architectural style for more than 10 years. Will I see you there?

Just released Mockly 1.5 that now exposes a GetMessageHandler method to hook your HttpMock directly into the HttpClient pipeline you're building with services.AddHttpClient. Check out the docs at mockly.org/docs/quick-sta…

Claude Opus 4.7 has just been released, and it’s already available in JetBrains AI Chat, Claude Agent and Junie. With a new reasoning approach and xhigh effort, it’s built for very complex tasks where deeper thinking pays off. Demos in 🧵

.NET skill catalog for AI agents github.com/managedcode/do…