static void Main(string[] args)
{
//action、func、task
Task <int> task = new Task <int>(a => { return((int)a + 1); }, 1);
task.Start();
Console.WriteLine(task.Result);
//func
Task <int> task1 = new Task <int>((a) => { return((int)a + 1); }, 2);
task1.Start();
Console.WriteLine(task1.Result);
//action
Task task2 = new Task((a) => { Console.WriteLine(a); }, "a");
task2.Start();
CancellationTokenSource souce = new CancellationTokenSource();
CancellationToken token = souce.Token;
var t = Do.ExcuteAsync(token);
Thread.Sleep(3000); //挂起 3 秒
// souce.Cancel(); //传达取消请求
t.Wait(token);
Console.WriteLine($"{nameof(token.IsCancellationRequested)}:{token.IsCancellationRequested}");
Console.ReadLine();
}