如何在c#中启动多个异步下载

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

class Program
{
    static async Task Main(string[] args)
    {
        List<string> urls = new List<string>
        {
            "https://example.com/file1",
            "https://example.com/file2",
            "https://example.com/file3"
        };

        List<Task> downloadTasks = new List<Task>();

        foreach (string url in urls)
        {
            downloadTasks.Add(DownloadFileAsync(url));
        }

        await Task.WhenAll(downloadTasks);

        Console.WriteLine("All downloads completed.");
    }

    static async Task DownloadFileAsync(string url)
    {
        using (WebClient client = new WebClient())
        {
            string fileName = GetFileNameFromUrl(url);
            await client.DownloadFileTaskAsync(url, fileName);
            Console.WriteLine($"Downloaded {fileName}");
        }
    }

    static string GetFileNameFromUrl(string url)
    {
        Uri uri = new Uri(url);
        return uri.Segments[uri.Segments.Length - 1];
    }
}