c#httpwebrequest getResponse()冻结并挂起我的程序

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

public class Program
{
    public static async Task Main(string[] args)
    {
        await SendRequestAsync();
    }

    public static async Task SendRequestAsync()
    {
        try
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");
            request.Method = "GET";

            using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
            {
                // 处理响应数据
            }
        }
        catch (WebException ex)
        {
            // 处理异常
        }
    }
}