wsl.exe -- cat hello.cs (Friends)

The Changelog: Software Development, Open Source

We bring you back to Microsoft Build 2025 to nerd out with Craig Loewen on Windows Subsystem for Linux and Mads Torgersen on leading the design of C#.

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Sponsors:

• Heroku – The Next Generation of Heroku “Fir” is coming soon — Fir is built on a foundation of cloud native technologies and open source standards, ensuring portability, interoperability, and a vibrant ecosystem for your applications. Cloud Native for everyone, for the next decade and beyond.
• Depot – 10x faster builds? Yes please. Build faster. Waste less time. Accelerate Docker image builds, and GitHub Actions workflows. Easily integrate with your existing CI provider and dev workflows to save hours of build time.

Featuring:

• Craig Loewen – Website, GitHub, LinkedIn, X
• Mads Torgersen – GitHub, LinkedIn
• Jerod Santo – GitHub, LinkedIn, Mastodon, X
• Adam Stacoviak – Website, GitHub, LinkedIn, Mastodon, X

Show Notes:

• The Windows Subsystem for Linux is now open source
• “Backslashes are Trash” by Mat Ryer on YouTube

Something missing or broken? PRs welcome!

Chapters

1. Let's talk! (00:00:00)

2. Sponsor: Heroku (00:00:38)

https://www.heroku.com/changelogpodcast

3. Meet Craig Loewen (00:03:44)

4. Getting to Dev Mode (00:05:43)

5. Adam wants a Wizard (00:07:51)

6. The idea behind WSL (00:09:59)

7. Exactly how it works (00:12:05)

8. Getting to Ubuntu (00:15:15)

9. Adam wants Hyper-V (00:16:03)

10. diff WSL Hyper-V (00:18:14)

11. The Windows allure (00:21:35)

12. Making it faster (00:22:33)

13. Open source (00:23:59)

14. Open contribution (00:25:03)

15. rsync on Windows: DOPE (00:29:05)

16. Backslashes are Trash (00:30:18)

https://youtu.be/pc-KKJUf3q4

17. File system mappings (00:33:00)

18. Baking it in (00:35:52)

19. Getting started (00:37:12)

20. Thanks, Craig! (00:39:07)

21. Sponsor: Depot (00:39:21)

https://depot.dev

22. Meet Mads Torgersen (00:41:31)

23. The C# handoff (00:43:17)

24. What it felt like (00:44:20)

25. Making design decisions (00:46:05)

26. Visiting C#landia (00:47:21)

27. Keeping up with trends (00:50:20)

28. Language envy (00:51:29)

29. Scripting C# (00:54:19)

30. The functional bits (00:55:58)

31. Backwards compat (01:00:00)

32. Team size (01:01:37)

33. AI language features (01:02:36)

34. A new kind of user (01:06:14)

35. AI language selection (01:07:56)

36. Programs as AI tools (01:10:36)

37. The best AI tool (01:12:23)

38. An AI language (01:13:45)

39. MS language innovation (01:15:24)

40. Hard times for new langs (01:17:10)

41. Optimistic about... (01:19:42)

42. Learning from kids (01:20:59)

43. Thanks, Mads! (01:26:00)

44. Coming up next (join ++) (01:26:40)

https://changelog.com/++