How do I install NUnit 3 console on Windows and run tests?

It is hard to find, because there is a lot of outdated documentation, either for NUnit2 or NUnit3.

Steps:

1. Official NUnit3 console installers are here: https://github.com/nunit/nunit-console/releases (path is different than in docs)
2. Download NUnit.Console-*.msi package and install
3. Add to system PATH variable this: C:\Program Files (x86)\NUnit.org\nunit-console
4. Open command line

5. Type:

   $ nunit3-console test.dll

// For running multiple test assemblies in parallel see: https://stackoverflow.com/a/45486444/1453525