Adding two DateTime Fields

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Hi All,
I have been scouring the net in efforts to find how to add 2 DateTime fields. I simply want to recieve the total hours by adding 2 DateTime fields. Any help would be appreciated...
Thanks Again!
-Raj

Why wont this work...?

DateTime dteMon, dteTue;

System.DateTime answer = dteMon.Add(dteTue);

Posted 22-Sep-10 13:34pm

WhiskeyBusiness

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Toli Cuturicu 23-Sep-10 18:18pm

You can not.

2 solutions

Solution 2

Thanks for helping understand this better guys! :)

Posted 4-Oct-10 4:55am

WhiskeyBusiness

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Peter_in_2780 · Accepted Answer · 2010-09-22T15:45:00

Looks like you want to subtract two DateTimes rather than add them. Subtracting gives a TimeSpan, which represents an interval. You can add TimeSpans.
Adding Monday 12:15 to Tuesday 09:45 doesn't make sense, but adding 1 day, 3 hours to 2 hours 45 minutes does make sense. Subtracting Monday 23:00 from Tuesday 07:15 does make sense, and should give 8 hours 15 minutes, which is a TimeSpan. You can add a DateTime and a TimeSpan to get another DateTime (Monday 18:00 + 11 hours gives Tuesday 05:00.)
Googling "subtract DateTime" goes straight to MSDN with all you need to know.

If you like this answer, vote for it, and mark it 'accepted'.