Help with c# file. What can I do?

My c# file won’t open in VSCode 2017 version 15.9. I have set VSCode 2017 in the preferences settings, I already updated Unity. What should I do?,My c# file wont open in VSCode 2017 version 15.9, I already updated Unity to the latest version from The Hub and already changed preferences to VSCode 2017. What can I do?

Did you try Preferences > External Tools >External Script Editor => VSCode ?