C#：如何以编程方式检查 Web 服务是否已启动并正在运行

如何以编程方式检查 Web 服务是否已启动并正在运行？

csharp
using System;
using System.Net;
class Program
{
    static void Main(string[] args)
    {
        string serviceUrl = "http://example.com/api";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrl);
        try
        {
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            if (response.StatusCode == HttpStatusCode.OK)
            {
                Console.WriteLine("Web 服务已启动并正在运行。");
            }
            else
            {
                Console.WriteLine("Web 服务未能正常启动或运行。");
            }
        }
        catch (WebException ex)
        {
            Console.WriteLine("Web 服务未能正常启动或运行。");
            Console.WriteLine(ex.Message);
        }
    }
}