static void Main(string[] args)
{
Console.WriteLine("模拟取消任务：");
//取消对象
var ch = new CancelHelper();
//将取消对象传入任务
new Thread(() =>
{
try
{
Task(ch);
}
catch (OperationCanceledException ex)
{
//捕捉到异常
Console.WriteLine("任务取消！");
}
}).Start();
//按下任意键之后取消任务
Console.ReadKey();
ch.Cancel();
Console.ReadKey();
}
