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

In addition to @DrewNoakes accepted answer, note that the nullable property can be set for all projects at once by adding a file called Directory.Build.props in the folder that contains your .sln file.

Just define your Directory.Build.props file like this:

  
    enable
  

You will need to restart Visual Studio for this to take effect.

More about Directory.Build.props.