TreeView 에 폴더추가 ( 폴더탐색기 )

string[] drives = Directory.GetLogicalDrives();

            foreach (string drive in drives)
            {
                DriveInfo di = new DriveInfo(drive);

                if (di.IsReady)
                {
                    TreeNode node = treeView1.Nodes.Add(drive);
                    node.Nodes.Add("\\");
                }
            }