.net 計算時間差

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()
           

+ "小時" + ts.Minutes.ToString() + "分鐘" 
           

+ ts.Seconds.ToString() + "秒"; 
           

} catch { } 
           

return dateDiff; 
           

}