If working with different tool chains, SDKs, and vendors, then one must use different environments.

With VS Code, this can end up in counter-intuitive situation. When I start a new Visual Studio Code instance, it will open a new window. But if there is already an instance running, it actually will re-using that environment. This can cause lots of subtle problems, including failed builds.

So how to start a new Visual Studio Code Window, with a new instance?