C# 当前时间和时间戳互相转换

1、当前时间转换为时间戳:

public static int ConvertDatetimeToInt(System.DateTime now)
{
    System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970,1,1));
    return (int)(now - startTime).TotalSeconds;
}

2、时间戳转换为当前时间：

public DateTime getDatetime(String timeStamp)
{
   System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
   long lTime = long.Parse(timeStamp + "0000000");
   TimeSpan toNow = new TimeSpan(lTime);
   return startTime.Add(toNow);
}