HttpClient 403捕获过期的应用编程接口令牌.Net核心3.1

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

public class Program
{
    public static async Task Main()
    {
        HttpClient httpClient = new HttpClient();
        
        try
        {
            HttpResponseMessage response = await httpClient.GetAsync("https://api.example.com/endpoint");
            response.EnsureSuccessStatusCode();
            
            // 处理响应数据
        }
        catch (HttpRequestException ex)
        {
            if (ex.StatusCode == System.Net.HttpStatusCode.Forbidden)
            {
                // 处理403错误，例如重新获取新的API令牌
            }
            else
            {
                // 处理其他异常
            }
        }
    }
}