public void UnExecute()
        {
            int i = 0;

            foreach (IObjectChangeCollection changeObj in changeObjList)
            {
                IWorldObject obj = changeObj as IWorldObject;
                toCollection.Remove(obj);
                IObjectCollectionParent from = fromCollection[i];
                from.Add(obj);
                changeObj.Parent = from as IWorldContainer;
                i++;
            }
        }