DirectoryInfo di = new DirectoryInfo(initPath);

                foreach (FileSystemInfo fsi in di.GetFileSystemInfos())
                {
                    if (fsi is FileInfo)
                    {
                     //是文件
                        FileInfo fi = (FileInfo)fsi;
                    
                    }
                    else
                    {
                     //是文件夹
                        DirectoryInfo di = (DirectoryInfo)fsi;
                    }
               
               
                }