1.xml存储
2.链式结构存储
List<Node> nodes = new List<Node>() { new Node { ID = 1, Name = "中国" }, new Node { ID = 2, Name = "北京市", ParentID = 1 }, new Node { ID = 3, Name = "吉林省", ParentID = 1 }, new Node { ID = 4, Name = "上海市", ParentID = 1 }, new Node { ID = 5, Name = "海淀区", ParentID = 2 }, new Node { ID = 6, Name = "朝阳区", ParentID = 2 }, new Node { ID = 7, Name = "大兴区", ParentID = 2 }, new Node { ID = 8, Name = "白山市", ParentID = 3 }, new Node { ID = 9, Name = "长春市", ParentID = 3 }, new Node { ID = 10, Name = "抚松县", ParentID = 8 }, new Node { ID = 11, Name = "靖宇县", ParentID = 8 } };