DateTime to long

private static DateTime BaseTime = new DateTime(1970, 1, 1);

将unixtime转换为.NET的DateTime   

 public static DateTime FromUnixTime(long timeStamp)
        {
            return new DateTime((timeStamp) * 10000000 + BaseTime.Ticks);
        }

将.NET的DateTime转换为unix time
public static long FromDateTime(DateTime dateTime)
        {
            return (dateTime.Ticks - BaseTime.Ticks) / 10000000;
        }