/// <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;
        }