1使用Task

        public Form1()
        {
            InitializeComponent();
            Init();
        }

        private void Init()
        {
            Task<int> task = new Task<int>(test);
            task.ContinueWith(Handler, TaskContinuationOptions.OnlyOnFaulted);
            task.Start();
        }

        private void Handler(Task<int> obj)
        {
            string id=("In handler thread ,id is " + Thread.CurrentThread.ManagedThreadId);
            var exception = obj.Exception;
            MessageBox.Show($"With thread id {id}, exception: {exception}");
        }

        private int test()
        {
            Console.WriteLine("In test thread ,id is " + Thread.CurrentThread.ManagedThreadId);
            throw new NotImplementedException();
        }

输出：控制台输出

In test thread ,id is 3

消息框输出：in handler Thread id is4