public void Remove(int item)
 {
     if (ContainedObjects.Remove(item))
     {
         if (Count == 0)
         {
             Partition.ActivatedNodes.RemoveAt(activationID);
         }
     }
 }
 public void RemoveFromSelection(LSAgent agent)
 {
     SelectedAgents.Remove(agent);
     SelectionChanged = true;
 }