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更新时间：2023-01-31 18:29:01
查看TimeSpan.TotalHours和Timespan .TotalMinutes属性：
Look at the TimeSpan.TotalHours and Timespan.TotalMinutes properties:
DateTime dt1 = new DateTime(2013, 10, 1, 17, 45, 00);
DateTime dt2 = new DateTime(2013, 10, 12, 19, 07, 30);
TimeSpan dif = dt2 - dt1;
Console.WriteLine("{0}:{1}", dif.TotalHours,dif.Hours);
Console.WriteLine("{0}:{1}", dif.TotalMinutes, dif.Minutes);