您告诉它将结果反序列化为列表，而实际上结果是具有1个属性(消息)的对象，而该对象具有2个属性(标头和正文) )，因此请确保您的对象结构匹配.对于这样的复杂结构，我发现 json2csharp 非常方便.

You're telling it to deserialize the result to a list, when actually the result is object with 1 property (message) which has 2 properties (header and body), so make sure your object structure matches. I find json2csharp extremely handy for complex structures like this.

public class TrackListResponse
{
    public Message message { get; set; }

    public class Header
    {
        public int status_code { get; set; }
        public double execute_time { get; set; }
        public int available { get; set; }
    }

    public class PrimaryGenres
    {
        public List<object> music_genre_list { get; set; }
    }

    public class SecondaryGenres
    {
        public List<object> music_genre_list { get; set; }
    }

    public class Track
    {
        public int track_id { get; set; }
        public string track_mbid { get; set; }
        public string track_isrc { get; set; }
        public string track_spotify_id { get; set; }
        public string track_soundcloud_id { get; set; }
        public string track_xboxmusic_id { get; set; }
        public string track_name { get; set; }
        public List<object> track_name_translation_list { get; set; }
        public int track_rating { get; set; }
        public int track_length { get; set; }
        public int commontrack_id { get; set; }
        public int instrumental { get; set; }
        public int @explicit { get; set; }
        public int has_lyrics { get; set; }
        public int has_lyrics_crowd { get; set; }
        public int has_subtitles { get; set; }
        public int has_richsync { get; set; }
        public int num_favourite { get; set; }
        public int lyrics_id { get; set; }
        public int subtitle_id { get; set; }
        public int album_id { get; set; }
        public string album_name { get; set; }
        public int artist_id { get; set; }
        public string artist_mbid { get; set; }
        public string artist_name { get; set; }
        public string album_coverart_100x100 { get; set; }
        public string album_coverart_350x350 { get; set; }
        public string album_coverart_500x500 { get; set; }
        public string album_coverart_800x800 { get; set; }
        public string track_share_url { get; set; }
        public string track_edit_url { get; set; }
        public string commontrack_vanity_id { get; set; }
        public int restricted { get; set; }
        public DateTime first_release_date { get; set; }
        public DateTime updated_time { get; set; }
        public PrimaryGenres primary_genres { get; set; }
        public SecondaryGenres secondary_genres { get; set; }
    }

    public class TrackList
    {
        public Track track { get; set; }
    }

    public class Body
    {
        public List<TrackList> track_list { get; set; }
    }

    public class Message
    {
        public Header header { get; set; }
        public Body body { get; set; }
    }
}

然后反序列化到外部对象:

Then just deserialize to the outer object:

JsonConvert.DeserializeObject<TrackListResponse>(content);