https://discussions.unity.com/t/weird-and-persistent-error-microsoft-r-visual-c-compiler-version-3-5-0-dev-20359-01-8da8ba0c/249416
Weird and persistent error : Microsoft (R) Visual C# Compiler version 3.5.0-dev-20359-01 (8da8ba0c)...
Nov 11, 2021 - I have a Unity 2020.3.22f1 project that was perfectly working at first. However, this error occured after editing and saving one of my scripts in Visual Studio...