C#时间间隔

public static double dateDiff(DateTime startDate, DateTime endDate)
{
TimeSpan ts = endDate.Subtract(startDate);//TimeSpan得到fromTime和toTime的时间间隔
double countday = ts.TotalDays;//获取两个日期间的总天数
return countday ;
}

public static double hourDiff(DateTime startDate, DateTime endDate)
{
TimeSpan ts = endDate.Subtract(startDate);//TimeSpan得到fromTime和toTime的时间间隔
double counthour = ts.TotalHours;//获取两个日期间的小时数
return counthour ;
}