using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Serialization;

public class Program

{

    public static void Main()

    {

        string Json = @"[""error"",{""code"":2,""msg"":""This API Key is invalid""}]";

​

        var result = JsonConvert.DeserializeObject<Result>(Json);

        Console.WriteLine("String: " + result.String);

        Console.WriteLine("Code: " + result.cm.Code);

        Console.WriteLine("Msg: " + result.cm.Msg);

    }

}

​

public class CodeMsg

{

    [JsonProperty("code")]

    public long Code { get; set; }

​

    [JsonProperty("msg")]

    public string Msg { get; set; }

}

​

[JsonConverter(typeof(ResultConverter))]

public class Result

{

    public string String { get; set; }

    public CodeMsg cm { get; set; }

}

​

public class ResultConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        return objectType == typeof(Result);

    }

​

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

    {

        JArray array = JArray.Load(reader);

        Result result = new Result

        {

            String = array[0].Value<string>(),

            cm = array[1].ToObject<CodeMsg>(serializer)

        };

        return result;

    }

​

    public override bool CanWrite

    {

        get { return false; }

    }

​

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

    {

        throw new NotImplementedException();

    }

}

​