c#获取16位guid随机字符串

        /// <summary>  
        /// 根据GUID获取16位的唯一字符串  
        /// </summary>  
        /// <param name="guid"></param>  
        /// <returns></returns>  
        public string To16String(Guid guid)
        {
            var i = guid.ToByteArray().Aggregate<byte, long>(1, (current, b) => current * (b + 1));
            return $"{i - DateTime.Now.Ticks:x}";
        }

 

        public static string GetId16() 
        {
            return BitConverter.ToString(
(new MD5CryptoServiceProvider()).ComputeHash(UTF8Encoding.Default.GetBytes(Guid.NewGuid().ToString())), 4, 8).Replace("-", "").ToLower();
        }