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by int_19h 3504 days ago
> Class extensions: I saw code examples online that just wouldn't work for me because the compiler told me a certain method of a built-in class wouldn't exist.

One thing that VS can now do (as of VS 2015) is tell you where exactly the "missing" extension method is, and offer to add a corresponding `using` declaration for you.

Not sure if VSCode or VS/Mac support that, though. But they are all built on the same code analysis engine, so there's no reason why they couldn't.