/// <summary>
        /// 拷贝目录内容
        /// </summary>
        /// <param name="source">源目录</param>
        /// <param name="destination">目的目录</param>
        /// <param name="copySubDirs">是否拷贝子目录</param>
        public static void CopyDirectory(DirectoryInfo source, DirectoryInfo destination, bool copySubDirs)
        {
            if (!destination.Exists)
            {
                destination.Create(); //目标目录若不存在就创建
            }
            FileInfo[] files = source.GetFiles();
            foreach (FileInfo file in files)
            {
                file.CopyTo(Path.Combine(destination.FullName, file.Name), true); //复制目录中所有文件
            }
            if (copySubDirs)
            {
                DirectoryInfo[] dirs = source.GetDirectories();
                foreach (DirectoryInfo dir in dirs)
                {
                    string destinationDir = Path.Combine(destination.FullName, dir.Name);
                    CopyDirectory(dir, new DirectoryInfo(destinationDir), copySubDirs); //复制子目录
                }
            }
        }