treeView把文件夹作为根节点内容作为子节点

 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            TreeNode root = new TreeNode();   
           root.Text = "目录";   
           GetFiles(@"E:Tools", root);   
           treeView1.Nodes.Add(root); 

        }

      private void GetFiles(string filePath, TreeNode node)   
       {   
           DirectoryInfo folder = new DirectoryInfo(filePath);   
           node.Text = folder.Name;   
           node.Tag = folder.FullName;   
              
           FileInfo[] chldFiles = folder.GetFiles("*.*");   
           foreach (FileInfo chlFile in chldFiles)   
           {   
               TreeNode chldNode = new TreeNode();   
               chldNode.Text = chlFile.Name;   
               chldNode.Tag = chlFile.FullName;   
               node.Nodes.Add(chldNode);   
           }   
  
           DirectoryInfo[] chldFolders = folder.GetDirectories();   
           foreach (DirectoryInfo chldFolder in chldFolders)   
           {   
               TreeNode chldNode = new TreeNode();   
               chldNode.Text = folder.Name;   
               chldNode.Tag = folder.FullName;   
               node.Nodes.Add(chldNode);   
               GetFiles(chldFolder.FullName, chldNode);   
           }   
              
       }

    }