问以Json格式返回带有对象名称的数据

EN

[Route("Constants/CountryList")]
[HttpGet]
public IHttpActionResult GetCountryList()
{
    IEnumerable<ISimpleListEntity> list = new CountryStore().SimpleSortedListByName();
    if (list == null || !list.Any())
    {
        return NotFound();
    }

    return Ok(list);
}

public interface ISimpleListEntity
{
    int Id { get; set; }
    string Name { get; set; }
}

[  
   {  
      "Id":1,
      "Name":"[Select]"
   },
   {  
      "Id":4,
      "Name":"India"
   },
   {  
      "Id":3,
      "Name":"Singapore"
   },
   {  
      "Id":2,
      "Name":"United Arab Emirates"
   }
]

{  
   "CountryList":[  
      {  
         "Id":1,
         "Name":"[Select]"
      },
      {  
         "Id":4,
         "Name":"India"
      },
      {  
         "Id":3,
         "Name":"Singapore"
      },
      {  
         "Id":2,
         "Name":"United Arab Emirates"
      }
   ]
}