winform treeView 数据绑定

 private void Form1_Load(object sender, EventArgs e)
        {
            Types = new List<UrlTypes>()
            {
                new UrlTypes() {Id = 1, Name = "中国", Value = "0", ParentId = 0},
                new UrlTypes() {Id = 2, Name = "河南", Value = "0", ParentId = 1},
                new UrlTypes() {Id = 3, Name = "河北", Value = "0", ParentId = 1},
                new UrlTypes() {Id = 4, Name = "南阳", Value = "0", ParentId = 2},
                new UrlTypes() {Id = 4, Name = "信阳", Value = "0", ParentId = 2},
                new UrlTypes() {Id = 5, Name = "新野", Value = "0", ParentId = 4},
                new UrlTypes() {Id = 6, Name = "石家庄", Value = "0", ParentId = 3}
            };
 
            var topNode = new TreeNode();
            topNode.Name = "0";
            topNode.Text = "世界";
            treeView1.Nodes.Add(topNode);
            Bind(topNode,Types,0);
             
            treeView1.ExpandAll();
        }
      private void Bind(TreeNode parNode,List<UrlTypes> list,int nodeId )
        {
            var childList = list.FindAll(t => t.ParentId == nodeId).OrderBy(t=>t.Id);
            foreach (var urlTypese in childList)
            {
                var node = new TreeNode();
                node.Name = urlTypese.Id.ToString();
                node.Text = urlTypese.Name;
                parNode.Nodes.Add(node);
                Bind(node,list,urlTypese.Id);
            }
        }
    public class UrlTypes
    {
        public int Id { get; set; }
 
        public string Name { get; set; }
 
        public string Value { get; set; }
 
        public int ParentId { get; set; }
    }