如何在Visual C#中发送HTTP2.0请求

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

class Program
{
    static async Task Main(string[] args)
    {
        // 创建HttpClient对象，并设置HTTP2.0版本
        var httpClientHandler = new HttpClientHandler();
        httpClientHandler.DefaultVersionPolicy = HttpVersionPolicy.RequestVersionExact;
        httpClientHandler.RequestHeaderFields.Add("http2-settings", "AAMAAABkAAQAAP__");

        var httpClient = new HttpClient(httpClientHandler);

        // 发送HTTP2.0请求
        var response = await httpClient.GetAsync("https://example.com");

        // 处理响应
        if (response.IsSuccessStatusCode)
        {
            var content = await response.Content.ReadAsStringAsync();
            Console.WriteLine(content);
        }
        else
        {
            Console.WriteLine("请求失败：" + response.StatusCode);
        }
    }
}