Is it safe to call the ContinueWith method on a TaskCompletionSource.Task (that has had it's .SetResult called)?

Question

Is it safe to use the ContinueWith(...) method on a TaskCompletionSource.Task if the TaskCompletionSource.SetResult(...) has already been

Answer 1

If the specified task has already completed by the time ContinueWith is called, the synchronous continuation will run on the thread calling ContinueWith. https://msdn.microsoft.com/en-us/library/dd321576(v=vs.110).aspx

Answer 2

Yes this should be fine, ContinueWith checks if the previous task completed or not, if so it will immediately queue up the continuation.