WhenAllExample

WhenAllExample.cs

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

public class WhenAllExample
{
    public static async Task Main(string[] args)
    {
        List<Task<string>> downloadTasks = new List<Task<string>>
        {
            DownloadAsync("https://example.com/page1"),
            DownloadAsync("https://example.com/page2"),
            DownloadAsync("https://example.com/page3")
        };

        // Wait for all downloads to complete
        string[] results = await Task.WhenAll(downloadTasks);

        Console.WriteLine("Downloads completed:");
        foreach (string result in results)
        {
            Console.WriteLine(result);
        }
    }

    public static async Task<string> DownloadAsync(string url)
    {
        using (HttpClient client = new HttpClient())
        {
            return await client.GetStringAsync(url);
        }
    }
}