Visual studio 2019 go to definition and Intellisense not working

Question

I have noticed a weird issue with Visual Studio 2019 v16.0.1 the IntelliSense about \"Using directive is unnecessary\" normally grey is missing and type reference suggestion

Answer 1

I think these issues are discussed here and are resolved by an update and some worksrounds are bring discussed:

https://developercommunity.visualstudio.com/content/problem/505489/cannot-navigate-to-the-symbol-under-the-caret-3.html