文件夹及子文件夹文件的遍历C#

 private void CopyFiles(string varFromDirectory, string varToDirectory)
        {
            Directory.CreateDirectory(varToDirectory);

            if (!Directory.Exists(varFromDirectory)) return;

            string[] directories = Directory.GetDirectories(varFromDirectory);

            if (directories.Length > 0)
            {
                foreach (string d in directories)
                {
                    CopyFiles(d, varToDirectory + d.Substring(d.LastIndexOf("\\")));
                }
            }

            string[] files = Directory.GetFiles(varFromDirectory);

            if (files.Length > 0)
            {
                foreach (string s in files)
                {
                    File.Copy(s, varToDirectory + s.Substring(s.LastIndexOf("\\")),true);
                }
            }
        }