public void Add(SensorTargetSet otherSet)
        {
            if (otherSet.Count > 0)
            {
                SensorTargetSet.Enumerator setIter = (SensorTargetSet.Enumerator)otherSet.GetEnumerator();

                while (setIter.MoveNext())
                {
                    Add(setIter.Current as SensorTarget);
                }
            }
        }
 public Enumerator(SensorTargetSet set)
 {
     this.set        = set;
     this.enumerator = (Dictionary <int, SensorTarget> .Enumerator)set.sensorTargets.GetEnumerator();
 }