琥珀春秋

 public void PopulateTreeView(string directoryValue, TreeNode parentNode)
        {
            string[] directoryArray = Directory.GetDirectories(directoryValue);
            try
            {
                if (directoryArray.Length != 0)
                {
                    foreach (string directory in directoryArray)
                    {
                        substringDirectory = 
directory.Substring(directory.LastIndexOf('\\') + 1, 
directory.Length - directory.LastIndexOf('\\') - 1);
                        TreeNode myNode = new TreeNode(substringDirectory);
                        parentNode.Nodes.Add(myNode);
                        PopulateTreeView(directory, myNode);
                    }
                }
            }
            catch (UnauthorizedAccessException)
            {
                parentNode.Nodes.Add("Access denied");
            }
        }