public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    //同时监听928 和 930 端口
                    webBuilder.UseUrls(ConfigHelper.AppConfig.AppSetting.Ip);
                    webBuilder.UseStartup<Startup>();
                });

public class ConfigHelper
    {
        private static IConfiguration _configuration;

        static ConfigHelper()
        {
            //在当前目录或者根目录中寻找appsettings.json文件
            var fileName = "appsettings.json";
            var directory = AppContext.BaseDirectory;
            directory = directory.Replace("\\", "/");
            var filePath = $"{directory}/{fileName}";
            if (!File.Exists(filePath))
            {
                var length = directory.IndexOf("/bin");
                filePath = $"{directory.Substring(0, length)}/{fileName}";
            }
            var builder = new ConfigurationBuilder()
                .AddJsonFile(filePath, false, true);
            _configuration = builder.Build();
        }
        public static AppConfig AppConfig
        {
            get
            {
                var app = _configuration.Get<AppConfig>();
                return app;
            }
        }

    }

public class AppConfig
    {
        /// <summary>
        /// 一般配置项目
        /// </summary>
        public AppSetting AppSetting { get; set; }
    }

"AppSetting": {
"Ip": [ "https://localhost:928", "http://localhost:58454" ],
},