“Visual Studio Live Share”, which enables developers using Visual Studio 2017 or Visual Studio Code to collaborate in real-time
When you share a collaborative session, your teammate sees the context of the workspace in their editor. This means your teammate can read the code you shared without having to clone a repo or install any dependencies your code relies on. They can use rich language features to navigate within the code; not only just opening other files as text but using semantic analysis-based navigation like Go to Definition or Peek."
Works with both "classic" Visual Studio and VS Code!