问如何使用C#中的流读取器高效地反序列化带有嵌套对象的JSON对象？

EN

{
    "bytes": 0,
    "path": "/Public",
    "is_dir": true,
    "contents": [
        {
            "bytes": 0,
            "modified": "Mon, 18 Jul 2011 20:13:43 +0000",
            "path": "/Public/1.txt",
            "is_dir": false
        },
        {
            "bytes": 0,
            "modified": "Mon, 18 Jul 2011 20:13:43 +0000",
            "path": "/Public/2.txt",
            "is_dir": false
        }
    ]
}

class JsonFileInfo
{
    public string Path;
    public long Bytes;
    public string Modified;
    public bool IsDir;
    public List<JsonFileInfo> Contents;
}

DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(RainstormFileInfo));
JsonFileInfo jfi = (JsonFileInfo)serializer.ReadObject(responseStream);

JsonReader reader = new JsonTextReader(new StreamReader(responseStream))
JsonSerializer serializer = new JsonSerializer();
JsonFileInfo jfi = serializer.Deserialize<JsonFileInfo>(reader);