/// <summary> 
/// 获取时间戳 
/// </summary> 
/// <returns></returns> 
public static string GetTimeStamp() 
{ 
  TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0); 
  return Convert.ToInt64(ts.TotalSeconds).ToString(); 
} 

// 时间戳转为C#格式时间
private DateTime StampToDateTime(string timeStamp)
{
  DateTime dateTimeStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
  long lTime = long.Parse(timeStamp + "0000000");
  TimeSpan toNow = new TimeSpan(lTime);
  return dateTimeStart.Add(toNow);
}
// DateTime时间格式转换为Unix时间戳格式
private int DateTimeToStamp(System.DateTime time)
{
  System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
  return (int)(time - startTime).TotalSeconds;
}