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Anders Hejlsberg

What Anders Hejlsberg thinks about developer tools

@anders-hejlsberg · 26 positions · On ppll ↗

Danish software engineer and Microsoft technical fellow, creator of Turbo Pascal and Delphi and lead architect of C# and TypeScript.

Anders Hejlsberg did not write this page.

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Only Anders Hejlsberg on developer tools. See everyone on developer tools

4 dated positions, 2026, in their own words. Our reading of what Anders Hejlsberg has said — not written or endorsed by them.

4 positions so far — this page is not yet offered to search engines.

  1. Our readingYou cannot build good tooling without a type system — decent tooling perhaps, but nothing that scales to a large team.

    Their wordswe knew from experience that you cannot build good tooling without a type system. You can build decent tooling, but it's never going to scale. It's never going to scale to large teams cuz you can't describe your intents in in the code.

    ↗TypeScript, C# and Turbo Pascal with Anders Hejlsbergyoutube.com 12th of 26 in this recording

  3. Our readingPeople adopted TypeScript for the tooling, not the types: an erasable type system is worth having because of the productivity the tooling built on it delivers.

    TypeScript

    Their wordsAnd the reason they came, I think, is absolutely because of the the better tooling. And I think we were totally right there that like adding a an erasable type system and then using that to enable great tooling is really where the pro where the programmer productivity boost is realized.

    ↗TypeScript, C# and Turbo Pascal with Anders Hejlsbergyoutube.com 15th of 26 in this recording

  5. Our readingA compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach.

    compilers

    Their wordsAnd so everything is lazy and deferred and functional and reusable inside the compiler. And it's a very different way of writing compilers than than what the textbooks will traditionally teach you.

    ↗TypeScript, C# and Turbo Pascal with Anders Hejlsbergyoutube.com 16th of 26 in this recording

  7. Our readingAn agent grepping for a name is not semantic search, and the language services an IDE already has are what AI will increasingly need.

    Their wordsAI today it's just starting to to become aware of you know the existence of of of language services and agents today like to use grep and awk and whatever you know to to find all the places where you reference a certain thing but it's not semantic search, right?

    ↗TypeScript, C# and Turbo Pascal with Anders Hejlsbergyoutube.com 23rd of 26 in this recording