System.Data.DataTable.CreateTableList C# (CSharp) Method

        private void CreateTableList(DataTable currentTable, List<DataTable> tableList)
        {
            foreach (DataRelation r in currentTable.ChildRelations)
            {
                if (!tableList.Contains(r.ChildTable))
                {
                    tableList.Add(r.ChildTable);
                    CreateTableList(r.ChildTable, tableList);
                }
            }
        }
        private void CreateRelationList(List<DataTable> tableList, List<DataRelation> relationList)