enum System.Threading.Tasks.TaskContinuationOptions flags:

   def enum
      None = 0
      PreferFairness = 1
      LongRunning = 2
      AttachedToParent = 4
      DenyChildAttach = 8
      HideScheduler = 16
      LazyCancellation = 32
      RunContinuationsAsynchronously = 64
      NotOnRanToCompletion = 65536
      NotOnFaulted = 131072
      OnlyOnCanceled = 196608
      NotOnCanceled = 262144
      OnlyOnFaulted = 327680
      OnlyOnRanToCompletion = 393216
      ExecuteSynchronously = 524288.

end enum.
