c# 复制文件夹内所有文件到另外一个文件夹

/// <summary>
        /// 将一个文件夹下的所有东西复制到另一个文件夹
        /// </summary>
        public static void CopyDireToDire(string sourceDir, string destDir)
        {
            DirectoryInfo sourceDireInfo = new DirectoryInfo(sourceDir);
            List<FileInfo> fileList = new List<FileInfo>();
            GetFileList(sourceDireInfo, fileList);
            List<DirectoryInfo> dirList = new List<DirectoryInfo>();
            GetDirList(sourceDireInfo, dirList);
            foreach (DirectoryInfo dir in dirList)
            {
                string m = dir.FullName;
                string n = m.Replace(sourceDir, destDir);
                if (!Directory.Exists(n))
                {
                    Directory.CreateDirectory(n);
                }
            }
            foreach (FileInfo fileInfo in fileList)
            {
                string m = fileInfo.FullName;
                string n = m.Replace(sourceDir, destDir);
                File.Copy(m, n, true);
            }
        }
        private static void GetFileList(DirectoryInfo dir, List<FileInfo> fileList)
        {
            fileList.AddRange(dir.GetFiles());
            foreach (DirectoryInfo directory in dir.GetDirectories()) GetFileList(directory, fileList);
        }
        private static void GetDirList(DirectoryInfo dir, List<DirectoryInfo> dirList)
        {
            dirList.AddRange(dir.GetDirectories());
            foreach (DirectoryInfo directory in dir.GetDirectories()) GetDirList(directory, dirList);
        }