//值是數(shù)組
 var a0 = Configuration.GetSection("RabbitMQ:Hosts").Get<string[]>();
//獲取數(shù)組第一個
 var a0 = Configuration["RabbitMQ:Hosts:0"];
//值是int類型
 var a1 = Configuration.GetValue<int>("RabbitMQ:Port");
//值是字符串
var a2 = Configuration.GetValue<string>("RabbitMQ:UserName");
var a2 = Configuration["RabbitMQ:UserName"];

    public class RabbitMQConfig
    {
        public const string RabbitMQ = "RabbitMQ";
        public string[] Hosts { get; set; }

        public int Port { get; set; }

        public string UserName { get; set; }

        public string Password { get; set; }

        public string VirtualHost { get; set; }
    }

  "RabbitMQ": {
    "Hosts": [ "xxx.xxx.xxx.xxx" ],
    "Port": 5672,
    "UserName": "admin",
    "Password": "xxxxxx",
    "VirtualHost": "myQueue"
  }

//startup配置 
services.Configure<RabbitMQConfig>(Configuration.GetSection(RabbitMQConfig.RabbitMQ));
//獲取數(shù)據(jù)
private readonly RabbitMQConfig _rabbitMQConfig;
public WeatherForecastController(IOptions<RabbitMQConfig> options)
{
    _rabbitMQConfig = options.Value;
}

var info = new RabbitMQConfig();
Configuration.Bind(RabbitMQConfig.RabbitMQ, info);
//or                        
Configuration.GetSection(RabbitMQConfig.RabbitMQ).Bind(info);