创建有序GUID

        [DllImport("rpcrt4.dll", SetLastError = true)]
        private static extern int UuidCreateSequential(out Guid guid);
        /// <summary>
        /// 创建有序的 guid。
        /// </summary>
        /// <returns></returns>
        public static Guid CreateSequentialGuid()
        {
            Guid result;
            UuidCreateSequential(out result);
            return result;
        }