schedular in windows service

I had written one windows service in C#.NET which fires on every miniutes... I want to fire a mail to my manager in every month on say xyz date.... this task shld repeted on every month on same date... So can any one tell me h开发者_StackOverflow中文版ow to do this..? I mean to say the block of code which i will write shld get executed on same date of every month...

This will give you a TimeSpan of the number of days/hours/minutes/etc. until the first day of the next month:

TimeSpan ts = DateTime.Now.AddDays(
  (DateTime.Now.Day - 1) * -1).AddMonths(1) - DateTime.Now;

Use DateTime.Today for midnight of the first day of next month.

You can use that to set the interval for a timer.

this looks like the perfect usage for quartz.net

var schedulerFactory = new StdSchedulerFactory();
var scheduler = schedulerFactory.GetScheduler();
scheduler.Start();

var jobDetail = new JobDetail("myJob", null, typeof (MyFooImplementation)); // MyFooImplementation needs to impelement IJob
var trigger = TriggerUtils.MakeMonthlyTrigger("myJobTrigger", 1, 0, 0);
scheduler.ScheduleJob(jobDetail, trigger);

more infos on .MakeMonthlyTrigger can be found here

otherwise i would got for the windows task scheduler ... the good old-fashioned way :)