C# codebase suddenly broken after update.

I need help.

I don’t know what’s going on. I just updated Visual Studio and Unity yesterday and now none of my code is compiling.

Attached image shows a small handful of standard assets that seem to be broken due to invalid references? 5000+ more of these, all in core assets.

Please help.

Visual Studio 2019 16.11.3
Unity 2020.3.18f1
Packages:
Visual Studio Code Editor: 1.2.4
Visual Studio Editor: 2.0.11

After updating unity to 2021.1 and performing a repair on Visual Studio, it looks like I’ve got all of these issues resolved, however, I’m facing a new issue with the camera. It’s throwing errors regarding an invalid pass: Depth of Field, but only when the camera is selected in the heirarchy or when its rendering in playmode.

I realize that’s a separate issue entirely, so I’ll mark this as answered and move on, but if you have inside regarding the secondary issue, that would be amazing.