c# alarm class - implementation?

[AndrewCherry]

I'm writing a simple little c# class to simply function as an alarm - you pass it a System.DateTime with the constructor, and when that time is reached, it fires an "Alarm" event. Simple enough. However, what's the most efficient way of doing this? Currently, I have thought of two ways. The first has a timer within the class that raises it's event every second or so, and each time it checks to see whether the time now is the same as the target time (accurate to the minute essentially, which is all that's neccesary). The second is to work out how many milliseconds is between the time the control is enabled, and the target time, and set the interval to that. With repeat turned off, this means that in theory the timer will fire when the alarm is due, which is maybe more efficient than regular comparison checking? Are these both crazy? Which is more sensible? Is the System.Timers.Timer accurate enough to do the second option anyway? Am i missing a very easy way of doing this that is nothing like the above? Thank you very much in advance for any comments.

[Colin Angus Mackay]

Yes, these options seem reasonable. --Colin Mackay--

"In the confrontation between the stream and the rock, the stream always wins - not through strength but perseverance." (H. Jackson Brown)

[Not Active]

Nothing crazy, these are probably the only two methods for accomplishing this. I'd go with the second method.