/// <summary>
  /// 時(shí)間工具類(lèi)
  /// </summary>
  public static class DateTimeUtil
  {
    /// <summary>
    /// 時(shí)間戳計(jì)時(shí)開(kāi)始時(shí)間
    /// </summary>
    private static DateTime timeStampStartTime = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
    /// <summary>
    /// DateTime轉(zhuǎn)換為10位時(shí)間戳（單位：秒）
    /// </summary>
    /// <param name="dateTime"> DateTime</param>
    /// <returns>10位時(shí)間戳（單位：秒）</returns>
    public static long DateTimeToTimeStamp(DateTime dateTime)
    {
      return (long)(dateTime.ToUniversalTime() - timeStampStartTime).TotalSeconds;
    }
    /// <summary>
    /// DateTime轉(zhuǎn)換為13位時(shí)間戳（單位：毫秒）
    /// </summary>
    /// <param name="dateTime"> DateTime</param>
    /// <returns>13位時(shí)間戳（單位：毫秒）</returns>
    public static long DateTimeToLongTimeStamp(DateTime dateTime)
    {
      return (long)(dateTime.ToUniversalTime() - timeStampStartTime).TotalMilliseconds;
    }
    /// <summary>
    /// 10位時(shí)間戳（單位：秒）轉(zhuǎn)換為DateTime
    /// </summary>
    /// <param name="timeStamp">10位時(shí)間戳（單位：秒）</param>
    /// <returns>DateTime</returns>
    public static DateTime TimeStampToDateTime(long timeStamp)
    {
      return timeStampStartTime.AddSeconds(timeStamp).ToLocalTime();
    }
    /// <summary>
    /// 13位時(shí)間戳（單位：毫秒）轉(zhuǎn)換為DateTime
    /// </summary>
    /// <param name="longTimeStamp">13位時(shí)間戳（單位：毫秒）</param>
    /// <returns>DateTime</returns>
    public static DateTime LongTimeStampToDateTime(long longTimeStamp)
    {
      return timeStampStartTime.AddMilliseconds(longTimeStamp).ToLocalTime();
    }
  }