Async/Await in 2019.2 and Visual Studio 2019

I’m trying out Async instead of Couroutines.

In VS2019 w/ Unity 2019.2, the editor is recognizing ‘async’ and ‘await’, - but not recognizing ‘Task’.
‘Task’ does not exist in the current context - am I missing a namespace or something?

Seems like its just supposed to work out of the box in the newer versions of Unity. Any help is appreciated, thank you,
Tim

using System.Threading.Tasks;