如何在C#中获取消息？

using System.Net.WebClient;

using (var client = new WebClient())
{
    string response = client.DownloadString("https://example.com");
    Console.WriteLine(response);
}

using System.Net;

using (WebRequest request = WebRequest.Create("https://example.com"))
{
    using (WebResponse response = request.GetResponse())
    {
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {
            string responseText = reader.ReadToEnd();
            Console.WriteLine(responseText);
        }
    }
}

using System.Net.Http;

using (HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://example.com"))
{
    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
    {
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {
            string responseText = reader.ReadToEnd();
            Console.WriteLine(responseText);
        }
    }
}

using System.Net.WebSockets;

using (var socket = new WebSocket("wss://example.com"))
{
    string response = await socket.ReceiveTextAsync();
    Console.WriteLine(response);
}