.net 计算时间差

private string DateDiff(DateTime DateTime1, DateTime DateTime2) { 

string dateDiff = null; 

try { TimeSpan ts1 = new TimeSpan(DateTime1.Ticks); 

TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);

 TimeSpan ts = ts1.Subtract(ts2).Duration();

 dateDiff = ts.Days.ToString() + "天"+ ts.Hours.ToString()

 + "小时" + ts.Minutes.ToString() + "分钟" 

+ ts.Seconds.ToString() + "秒"; 

} catch { } 

return dateDiff; 

}