---

title: 'Lesson 1: Using Quartz'
---

Before you can use the scheduler, it needs to be instantiated (who'd have guessed?).
To do this, you use an implementor of ISchedulerFactory.

Once a scheduler is instantiated, it can be started, placed in stand-by mode, and shutdown.
Note that once a scheduler is shutdown, it cannot be restarted without being re-instantiated.
Triggers do not fire (jobs do not execute) until the scheduler has been started, nor while it is
in the paused state.

Here's a quick snippet of code, that instantiates and starts a scheduler, and schedules a job for execution:

__Using Quartz.NET__

```csharp
    // construct a scheduler factory
    ISchedulerFactory schedFact = new StdSchedulerFactory();
    
    // get a scheduler
    IScheduler sched = schedFact.GetScheduler();
    sched.Start();
    
 // define the job and tie it to our HelloJob class
 IJobDetail job = JobBuilder.Create<HelloJob>()
  .WithIdentity("myJob", "group1")
  .Build();

 // Trigger the job to run now, and then every 40 seconds
 ITrigger trigger = TriggerBuilder.Create()
      .WithIdentity("myTrigger", "group1")
      .StartNow()
      .WithSimpleSchedule(x => x
          .WithIntervalInSeconds(40)
          .RepeatForever())
      .Build();
   
    sched.ScheduleJob(job, trigger);
```

As you can see, working with Quartz.NET is rather simple. In [Lesson 2](jobs-and-triggers.md) we'll give a quick overview of Jobs and Triggers, so that you can more fully understand this example.
