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Sebastien Ros

@sebastienros.me

Developer on the ASP.NET team at Microsoft working on Performance and Aspire. Maintainer of some .NET open source projects like Orchard Core, Jint, Fluid, Parlot, YesSql, ...

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Latest posts by Sebastien Ros @sebastienros.me

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Did you hear?! #AspireConf is coming March 23! ๐Ÿ’ซ Are you as excited as we are?! Save the date and see the agenda so far: aspire.dev/aspireconf/?...

#Python #TypeScript #dotnet #AspireDev

04.03.2026 18:00 ๐Ÿ‘ 18 ๐Ÿ” 7 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 5

Today I discovered I am also a React Native developer. Who would have known...

22.02.2026 00:06 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Like the old times I'll get to work in the same room as @blowdart.me . That will be a spicy room.

19.02.2026 17:15 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

So my tool might be better and simpler with that ...

18.12.2025 20:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

It only took 30 minutes and 2K lines of code (didn't write a single one) from concept to reality. It's awesome, AMA

18.12.2025 17:32 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I am about to write a C# serializer. It's not what you may think it is. It's a serializer that would serialize an object to "C#". Running the result would instantiate the object back. Awesome opportunities.

18.12.2025 16:10 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 1
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Courtesy @damianedwards.com

11.12.2025 23:35 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

I have been using Opus 4.5 with copilot for a week now. I am in owe. It manages to solve issues in minutes that I would probably not be able to fix myself with any acceptable amount of time or help. I can't even imagine the impact it will have on our industry. And it's a ripple effect with software.

06.12.2025 21:56 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Coming Soon: The Economics of Everyday Things

There is no such thing as dental insurance. It's a gift card. open.spotify.com/episode/5QXf...

13.11.2025 23:58 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Because you are a European citizen to provide a W8 so they can justify not withholding taxes, exactly what you wish. And that makes my sponsorship more valuable ๐Ÿ˜

07.11.2025 21:35 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I'll be in Prague next week between November 10th and 12th for the Orchard Conference. Maybe I'll see you there!

07.11.2025 04:20 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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PC was randomly crashing and felt hot on touch. I think I found the reason ... this is where the fan pushes the hot air through, or was trying to.

03.11.2025 19:01 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

I learned to read, not recommended.

25.10.2025 01:10 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I wish anyone had that much support from their colleagues

17.10.2025 03:13 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

You can hard-code my IP address maybe?

17.10.2025 01:08 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Last time I read it I used the Read mode in Edge, I think it was hard to read without.

16.10.2025 19:43 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Registration for the Orchard Harvest 2025 conference is open. It will be held in Prague, on Nov. 11 & 12, 2025. Find more about tickets, speaker opportunities, and programs at hubs.ly/Q03M1z2G0
#OrchardHarvest2025

06.10.2025 12:52 ๐Ÿ‘ 0 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Nothing compared to wanting to delete one of the main radio stations in France

23.09.2025 16:34 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I had a good experience asking copilot to do it

19.09.2025 13:39 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

accepting AI PRs from Sebastien is such an insult. It's like Picasso sending me a Hallmark birthday card.

12.09.2025 17:32 ๐Ÿ‘ 2 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Challenge accepted. But note that the last PR I made to this project used AI and it got reverted because it broke something. I blame him though for not having tests covering this part, the changes looked good. Kirill doesn't want to talk to me now.

12.09.2025 14:25 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

My goal is to add AI to @kirillosenkov.com's project

12.09.2025 14:07 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

In 3 letters (2 letters and one digit)?

28.08.2025 02:01 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Show me and I'll tell you if it's good

13.08.2025 20:15 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

They are just scared

22.05.2025 21:57 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

At the rate of spam calls I am receiving I should have all existing phone numbers blocked by next year.

24.04.2025 18:20 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Trop bien! Merci

11.04.2025 01:38 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Output caching middleware in ASP.NET Core Learn how to configure and use output caching middleware in ASP.NET Core.

This is a doc about "Response caching"... It doesn't mention output caching which your article is about. Here is the doc about output caching learn.microsoft.com/en-us/aspnet...

12.03.2025 12:48 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Did he say, "let's go" and then you went 10x faster?

11.03.2025 17:34 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Also, using the term "Response Caching" in this context is confusing because there is a different middleware with this name and "Output Caching" was created to improve on it.

11.03.2025 17:20 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0