当从当前函数内部可见时,是否应将cancellationtoken传递给task.run()。

对我在书中找到的测试取消令牌进行编码。只是想知道为什么 token 作为参数传递给 Task.Run() . 据我所知,这是无用的。我可以省略这个参数,代码将以同样的方式运行。我说的对吗?

public static void testCancellationToken()
{
    CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
    CancellationToken token = cancellationTokenSource.Token;

    Task task = Task.Run(() =>
    {

        while (!token.IsCancellationRequested)
        {
            Thread.Sleep(1000);
            Console.Write("*");
        }

        token.ThrowIfCancellationRequested();

    },token);

    try
    {
        Console.WriteLine("press any key to stop task");
        Console.ReadLine();
        cancellationTokenSource.Cancel();
        task.Wait();
    }
    catch (AggregateException e)
    {
        Console.WriteLine("got exception "+ e.InnerExceptions[0] );

    }

}