Add async API for a few extension methods#474

Closed

IEvangelist wants to merge 2 commits into

commandlineparser:masterfrom

IEvangelist:add-async

Commits on Jul 11, 2019

Add async API for a few extension methods, allowing task-based Main entry point.
IEvangelist
committed
Added compiler preprocessor checks for NET40 that doesn't support async
IEvangelist
committed