如何从Task.WhenAll执行中返回未取消的任务

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

public class Program
{
    public static async Task Main()
    {
        // 创建任务列表
        var tasks = new List<Task<int>>();
        tasks.Add(DoWorkAsync(1, 1000));
        tasks.Add(DoWorkAsync(2, 2000));
        tasks.Add(DoWorkAsync(3, 3000));

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

        // 获取未取消的任务
        var completedTasks = tasks.FindAll(t => !t.IsCanceled);

        // 输出未取消任务的结果
        foreach (var task in completedTasks)
        {
            Console.WriteLine($"Task {task.Id} completed with result: {task.Result}");
        }
    }

    public static async Task<int> DoWorkAsync(int taskId, int delay)
    {
        Console.WriteLine($"Task {taskId} started");
        await Task.Delay(delay);
        Console.WriteLine($"Task {taskId} completed");
        return taskId;
    }
}