非同步可取消輪詢在迭代之間等待的任務

public class Foo
{
    private const int TASK_ITERATION_DELAY_MS = 1000;
    private CancellationTokenSource _cts;

    public Foo()
    {
        this._cts = new CancellationTokenSource();
    }

    public void StartExecution()
    {
        Task.Factory.StartNew(this.OwnCodeCancelableTask_EveryNSeconds, this._cts.Token);
    }

    public void CancelExecution()
    {
        this._cts.Cancel();
    }

    /// <summary>
    /// "Infinite" loop that runs every N seconds. Good for checking for a heartbeat or updates.
    /// </summary>
    /// <param name="taskState">The cancellation token from our _cts field, passed in the StartNew call</param>
    private async void OwnCodeCancelableTask_EveryNSeconds(object taskState)
    {
        var token = (CancellationToken)taskState;

        while (!token.IsCancellationRequested)
        {
            Console.WriteLine("Do the work that needs to happen every N seconds in this loop");

            // Passing token here allows the Delay to be cancelled if your task gets cancelled.
            await Task.Delay(TASK_ITERATION_DELAY_MS, token);
        }
    }
}