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I think you can on OSX/Linux. It's not on Windows. If I had to guess, it's because VS Community exists.

I was debugging a Node app on Windows with VSCode about 20 minutes ago.

You can debug a Node application, my comment was with regards to a C# application.

You can already debug C# programs on OSX and Linux, I've done it myself. You can't debug ASP.NET apps yet but it's in the pipeline apparently.