How can I raise an event every hour (or specific time interval each hour) in .NET?

System.Timers.Timer. If you want to run at specific times of the day, you will need to figure out how long it is until the next time and set that as your interval.

This is just the basic idea. Depending on how precise you need to be you can do more.

int minutes = DateTime.Now.Minute;
int adjust = 10 - (minutes % 10);
timer.Interval = adjust * 60 * 1000;