获取文件夹大小

       /// <summary>
        ///     获取文件夹大小
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        private long GetDictSize(string path)
        {
            if (!Directory.Exists(path))
                return 0;
            string[] fs = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories);
            //获取该文件夹中所有的文件名
            return (from f in fs let fa = File.GetAttributes(f) select new FileInfo(f) into fi select fi.Length).Sum();
        }

 

    如需转换为MB单位   则（返回结果）/1024/1024