在C#中通过远程处理获取外部IP地址

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

public static async Task<string> GetExternalIPAddressAsync()
{
    using var httpClient = new HttpClient();
    var response = await httpClient.GetAsync("https://api.ipify.org?format=json");
    response.EnsureSuccessStatusCode();
    var responseBody = await response.Content.ReadAsStringAsync();
    return responseBody;
}

using System;
using System.Net;

public static string GetExternalIPAddress()
{
    using var webClient = new WebClient();
    return webClient.DownloadString("https://api.ipify.org?format=json");
}

using System;
using System.Net;
using System.IO;

public static string GetExternalIPAddress()
{
    var request = WebRequest.Create("https://api.ipify.org?format=json");
    using var response = request.GetResponse();
    using var stream = response.GetResponseStream();
    using var reader = new StreamReader(stream);
    return reader.ReadToEnd();
}