What to do if Visual Studio 2019 shows errors where there are none?

Question

C++ / C#

Answer 1

Close the application.
Delete the generated .sln files in the project folder. Open the application, click in External tools -> regenerate project files.
Reopen the editor after all the manipulations.
There was a bug in vsCode by type, but with the UI namespace

Answer 2

I see that you are opening VS from outside of Unity. Add the unit as a VS 2019 code editor in the settings. Unfortunately, I don’t remember the path to this nitroka, google it.

Answer 3