public class TimeRange 

public void StepMapTime()
{
  //Get the active view
  MapView mapView = MapView.Active;
  if (mapView == null)
    return;

  //Step current map time forward by 1 month
  TimeDelta timeDelta = new TimeDelta(1, TimeUnit.Months);
  mapView.Time = mapView.Time.Offset(timeDelta);
}

public Task<List<TimeRange>> GetInterpolatedMapTimes()
{
  //Return the collection representing the map time for each frame in animation.
  return QueuedTask.Run(() =>
  {
    var mapView = MapView.Active;
    if (mapView != null || mapView.Animation == null)
      return null;

    var animation = mapView.Map.Animation;

    var timeRanges = new List<TimeRange>();
    //We will use ticks here rather than milliseconds to get the highest precision possible.
    var ticksPerFrame = Convert.ToInt64(animation.Duration.Ticks / (animation.NumberOfFrames - 1));
    for (int i = 0; i < animation.NumberOfFrames; i++)
    {
      var time = TimeSpan.FromTicks(i * ticksPerFrame);
      //Because of rounding for ticks the last calculated time may be greating than the duration.
      if (time > animation.Duration)
        time = animation.Duration;
      timeRanges.Add(mapView.Animation.GetCurrentTimeAtTime(time));
    }
    return timeRanges;
  });
}