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一个日期加上或减去一个值 (比如年份):
DateTime newDate = DateTime.Now.AddYears(2); //加
DateTime newDate = DateTime.Now.AddYears(-2); //减
两个日期相减
DateTime date1 = new DateTime(2007,7,15);
DateTime date2 = DateTime.Now;
TimeSpan ts = date2 - date1;
int iDay= ts.Days;
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DateTime newDate = DateTime.Now.AddYears(2); //加
DateTime newDate = DateTime.Now.AddYears(-2); //减
两个日期相减
DateTime date1 = new DateTime(2007,7,15);
DateTime date2 = DateTime.Now;
TimeSpan ts = date2 - date1;
int iDay= ts.Days;
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