在C#中保持http连接存活？

using System;
using System.Net.Http;

class Program
{
    static void Main(string[] args)
    {
        using (var httpClient = new HttpClient())
        {
            // 设置HttpClient的基址
            httpClient.BaseAddress = new Uri("https://www.example.com/");

            // 发送第一个请求
            var response1 = httpClient.GetAsync("/api/resource1").Result;
            var content1 = response1.Content.ReadAsStringAsync().Result;
            Console.WriteLine("Response 1: " + content1);

            // 发送第二个请求
            var response2 = httpClient.GetAsync("/api/resource2").Result;
            var content2 = response2.Content.ReadAsStringAsync().Result;
            Console.WriteLine("Response 2: " + content2);
        }
    }
}