ASP.NET / C#: Best way to add and subtract hours from the time of day

Using ASP.NET/C#, what is the best way to add and subtract from the time of day in 24 hour format?

For example, 22 + 2 should = 0 and 3 - 5 should equal 22 because 22:00 plus two hours is midnight and five hours before 3:00 am is 22:00.
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Russ SuterSenior Software DeveloperCommented:
DateTime myDate = DateTime.Now.AddHours(2); // adds 2 hours to current time

myDate = DateTime.Now.AddHours(-2) // subtracts 2 hours from current time

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There's also AddSeconds, AddMinutes, AddDays, AddMonths, AddYears. Even AddMilliseconds.

Displaying the time in Military time is as simple as:


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you need to use uppercase HH for 24 hour time.

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