public void Operate(IList <MotionObjectInfo> selectedInfoList, IList <ProcParam <MotionProcEnv> > args, MotionDataSet dataSet, ProgressInformation progressInfo)
{
NumberParameter begin = args[0] as NumberParameter;
NumberParameter end = args[1] as NumberParameter;
dataSet.RemoveFrameAll((f, i) => f.Time < begin.Value || end.Value < f.Time);
}