protected void GetNextCollection()
        {
            CamlQuery query = PrepareQueryForCurrent();

            Current = TargetList.GetItems(query);
            TargetList.Context.Load(Current);
            TargetList.Context.ExecuteQuery();
            Position = Current.ListItemCollectionPosition;
            if (Position == null)
            {
                endReached = true;
            }
        }