When I want to edit C# Unity scripts, they open in Visual Studio. It is supposed to provide auto complete for all Unity related code, but it doesn\'t work.
Here you c
Unload and reload the project, in Visual Studio:
Fixed!
I found this solution to work the best (easiest), having run into the problem multiple times.
Source: https://alexdunn.org/2017/04/26/xamarin-tips-fixing-the-highlighting-drop-in-your-xamarin-android-projects/