Creates a continuation that executes asynchronously when the target System.Threading.Tasks.Task completes.
- continuationAction
- An action to run when the System.Threading.Tasks.Task completes. When run, the delegate will be passed the completed task as an argument.
A new continuation System.Threading.Tasks.Task.
The returned System.Threading.Tasks.Task will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled.