C# 線程異常 捕獲

要想在主線程捕獲其他線程異常，需阻塞主線程，等所有線程執行結束，方可捕獲異常；
否則無法捕獲異常；

下面這種方式，線程拋出異常，代碼走不進catch，catch無法捕獲異常

static void GetThreadException1()
{
    try
    {
        Task.Run(() =>
        {
            Console.WriteLine("dosomething");
            throw new Exception("test exception");
        });

        Task.Run(() => Console.WriteLine("dosomething else"));
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex);
    }
}

下面這種，catch可以捕獲到線程異常信息

static void GetThreadException2()
{
    try
    {
        var taskList = new List<Task>();
        taskList.Add( Task.Run(() =>
        {
            Console.WriteLine("dosomething");
            throw new Exception("test exception");
        }));

       taskList.Add( Task.Run(() => Console.WriteLine("dosomething else")));

        Task.WaitAll(taskList.ToArray());
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex);
    }
}