I have a task and I expect it to take under a second to run but if it takes longer than a few seconds I want to cancel the task.
For example:
Task t = new Task(() =>
{
while (true)
{
Thread.Sleep(500);
}
});
t.Start();
t.Wait(3000);
Notice that after 3000 milliseconds the wait expires. Was the task canceled when the timeout expired or is the task still running?
If you want to cancel a Task, you should pass in a CancellationToken when you create the task. That will allow you to cancel the Task from the outside. You could tie cancellation to a timer if you want.
To create a Task with a Cancellation token see this example:
var tokenSource = new CancellationTokenSource();
var token = tokenSource.Token;
var t = Task.Factory.StartNew(() => {
// do some work
if (token.IsCancellationRequested) {
// Clean up as needed here ....
}
token.ThrowIfCancellationRequested();
}, token);
To cancel the Task call Cancel() on the tokenSource.