註意點：需要將每個線程的 MemoryCacheManager 保存，這裏我保存在緩存中，需要取消時根據緩存key值取出 MemoryCacheManager

        //開始Task1
        private void button1_Click(object sender, EventArgs e)
        {
            CheckForIllegalCrossThreadCalls = false;//winform運行跨線程

            ICacheManager cacheManager = new MemoryCacheManager();
            
 
var cts1 = new CancellationTokenSource();
            CancellationToken ct1 = cts1.Token;
            Task.Factory.StartNew(() =>
            {
                while (true)
                {
                    Thread.Sleep(500);
                    listView1.Items.Add("AA當前時間：" + DateTime.Now.ToString("
 
yyyy-MM-dd HH:mm:ss"));
                    if (ct1.IsCancellationRequested)
                    {
                        // another thread decided to cancel
                        listView1.Items.Add("task1 canceled");
                        cacheManager.Remove("cts1");
                        break
 
;
                    }
                }
            }, ct1);

            if (!cacheManager.IsSet("cts1"))
            {
                cacheManager.Set("cts1", cts1, 20);
            }
        }

        //開始Task2
        private void button2_Click(object sender, EventArgs e)
        {
            CheckForIllegalCrossThreadCalls = false;//winform運行跨線程

            ICacheManager cacheManager = new MemoryCacheManager();
            var cts2 = new CancellationTokenSource();
            CancellationToken ct2 = cts2.Token;
            Task.Factory.StartNew(() =>
            {
                while (true)
                {
                    Thread.Sleep(500);
                    listView1.Items.Add("BB當前時間：" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
                    if (ct2.IsCancellationRequested)
                    {
                        // another thread decided to cancel
                        listView1.Items.Add("task1 canceled");
                        cacheManager.Remove("cts2");
                        break;
                    }
                }
            }, ct2);

            if (!cacheManager.IsSet("cts2"))
            {
                cacheManager.Set("cts2", cts2, 20);
            }
        }

        //停止Task1
        private void button3_Click(object sender, EventArgs e)
        {
            ICacheManager cacheManager = new MemoryCacheManager();
            var cts = cacheManager.Get<CancellationTokenSource>("cts1");
            cts.Cancel();
        }

        //停止Task2
        private void button4_Click(object sender, EventArgs e)
        {
            ICacheManager cacheManager = new MemoryCacheManager();
            var cts = cacheManager.Get<CancellationTokenSource>("cts2");
            cts.Cancel();
        }

Task 開始 停止