How to enable Nullable Reference Types feature of C# 8.0 for the whole project

Question

According to the C# 8 announcement video the \"nullable reference types\" feature can be enabled for the whole project.

But how to enable it for the project? I did n

Answer 1

Worth noting that, by now, this is also an exposed setting in a project's Properties page:

At least in VS2019 16.6+.