Intellisense/Colors not working after upgrading to VisualStudio Editor 2.0.11

[AshwinTheGammer]

After upgrading from VisualStudioEditor 2.0.2 to 2.0.11 via package manager. Neither intellisense nor some colors are highlighting.
For example, GameObject used to highlight in GreenColor.
I tried clicking Regenerate csproj files(Preference>External Tools) but it didn’t work.

[Kurt-Dekker]

This may help you with intellisense and possibly other Visual Studio integration problems:

Sometimes the fix is as simple as doing Assets → Open C# Project from Unity. Other times it requires more.

Intellisense Not Working with Visual Studio (Fix)

Likely, if you have appeared here to this page you are having the problem I had for the past hour or so. Intellisense is not working in Visual Studio. Well lucky for you, I figured out the solution to fix this issue after searching the entire web. So you don’t have to search the web anymore, I will tell you how I fixed the issue. Step 1: Close Visual Studio Step 2: In Unity, go to Edit < Preferences < External Tools (left part of the Window) Step 3: In External Tools go to the part that sa…

Also, try update the VSCode package inside of Unity: Window → Package Manager → Search for Visual Studio Code Editor → Press the Update button

Also, this: No suggestions in Vscode