用减法!
System.DateTime date1 = new System.DateTime(1996, 6, 3, 22, 15, 0);
System.DateTime date2 = new System.DateTime(1996, 12, 6, 13, 2, 0);
System.DateTime date3 = new System.DateTime(1996, 10, 12, 8, 42, 0); // diff1 gets 185 days, 14 hours, and 47 minutes.
System.TimeSpan diff1 = date2.Subtract(date1); // date4 gets 4/9/1996 5:55:00 PM.
System.DateTime date4 = date3.Subtract(diff1); // diff2 gets 55 days 4 hours and 20 minutes.
System.TimeSpan diff2 = date2 - date3; // date5 gets 4/9/1996 5:55:00 PM.
System.DateTime date5 = date1 - diff2;
System.DateTime date1 = new System.DateTime(1996, 6, 3, 22, 15, 0);
System.DateTime date2 = new System.DateTime(1996, 12, 6, 13, 2, 0);
System.DateTime date3 = new System.DateTime(1996, 10, 12, 8, 42, 0); // diff1 gets 185 days, 14 hours, and 47 minutes.
System.TimeSpan diff1 = date2.Subtract(date1); // date4 gets 4/9/1996 5:55:00 PM.
System.DateTime date4 = date3.Subtract(diff1); // diff2 gets 55 days 4 hours and 20 minutes.
System.TimeSpan diff2 = date2 - date3; // date5 gets 4/9/1996 5:55:00 PM.
System.DateTime date5 = date1 - diff2;
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MessageBox.Show(vDT.TotalMinutes.ToString());vDT还有很多属性,你可以自己看看
TimeSpan ts = DateTime1 - DateTime2;