c# 计算两个时间的时间差

//计算2个日期之间的天数差
DateTime dt1 = Convert.ToDateTime("2007-8-1");    
DateTime dt2 = Convert.ToDateTime("2007-8-15");   
TimeSpan span = dt2.Subtract(dt1);              
int dayDiff = span.Days ;

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转载自www.cnblogs.com/gaara-zhang/p/9215073.html