如何在C#中下载HTML源代码？

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

namespace DownloadHtmlSourceCode
{
    class Program
    {
        static async Task Main(string[] args)
        {
            string url = "https://www.example.com";
            string htmlSourceCode = await DownloadHtmlSourceCodeAsync(url);
            Console.WriteLine(htmlSourceCode);
        }

        static async Task<string> DownloadHtmlSourceCodeAsync(string url)
        {
            using HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = await httpClient.GetAsync(url);
            response.EnsureSuccessStatusCode();
            string htmlSourceCode = await response.Content.ReadAsStringAsync();
            return htmlSourceCode;
        }
    }
}