Unity 获取时间戳

/// <summary>获取秒级别时间戳（10位）</summary>
        public static long GetTimestampToSeconds()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalSeconds);
        }

        /// <summary>获取毫秒级别时间戳（13位）</summary>
        public static long GetTimeStampToMilliseconds()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalMilliseconds);
        }