C#线程任务 - 无法从任务数组中获取返回值

using System;
using System.Threading;
using System.Threading.Tasks;

class Program
{
    static void Main()
    {
        Task<int>[] tasks = new Task<int>[3];

        // 创建并启动任务
        tasks[0] = Task.Run(() => DoWork(1));
        tasks[1] = Task.Run(() => DoWork(2));
        tasks[2] = Task.Run(() => DoWork(3));

        // 等待所有任务完成
        Task.WaitAll(tasks);

        // 获取任务的返回值
        int result1 = tasks[0].Result;
        int result2 = tasks[1].Result;
        int result3 = tasks[2].Result;

        Console.WriteLine("Task 1 result: " + result1);
        Console.WriteLine("Task 2 result: " + result2);
        Console.WriteLine("Task 3 result: " + result3);
    }

    static int DoWork(int taskId)
    {
        // 模拟耗时操作
        Thread.Sleep(1000);

        return taskId * 10;
    }
}