学步园

 DirectoryInfo 类，公开用于创建、移动和枚举目录和子目录的实例方法。

FileInfo类，提供创建、复制、删除、移动和打开文件的属性和实例方法，并且帮助创建 FileStream
对象。

例如:

                DirectoryInfo dir = new DirectoryInfo("string of the path");              

                foreach (DirectoryInfo dirinfo in dir.GetDirectories())
                {
                    treenode.Nodes.Add(dirinfo.Name);                       

                    DirectoryInfo dinfo = new DirectoryInfo("string of the next path");
                    foreach (FileInfo file in dinfo.GetFiles())
                    {
                        treenode.LastNode.Nodes.Add(file.Name);
                    }
                }