C#生成一个按时间排序的DUID

/// <summary>

        /// 创建一个按时间排序的Guid

        /// </summary>

        /// <returns></returns>

        public static string GetID()

        {

            byte[] guidArray = Guid.NewGuid().ToByteArray();

            DateTime now = DateTime.Now;

            DateTime baseDate = new DateTime(1900, 1, 1);

            TimeSpan days = new TimeSpan(now.Ticks - baseDate.Ticks);

            TimeSpan msecs = new TimeSpan(now.Ticks - (new DateTime(now.Year, now.Month, now.Day).Ticks));

            byte[] daysArray = BitConverter.GetBytes(days.Days);

            byte[] msecsArray = BitConverter.GetBytes((long)(msecs.TotalMilliseconds / 3.333333));

            Array.Copy(daysArray, 0, guidArray, 2, 2);

            //毫秒高位

            Array.Copy(msecsArray, 2, guidArray, 0, 2);

            //毫秒低位

            Array.Copy(msecsArray, 0, guidArray, 4, 2);

            return new System.Guid(guidArray).ToString();

        }