using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string jsonString = "{\"error\":{\"code\":-10,\"message\":{\"lang\":\"en-us\",\"value\":\"The warehouse is not defined for the item.  [OWOR.Warehouse]\"}}}";

        var result =JsonConvert.DeserializeObject<Root>(jsonString);

        Console.WriteLine(result.error.code);

        Console.WriteLine(result.error.message.lang);   

        Console.WriteLine(result.error.message.value);  

    }

}

​

public class Message

{

    public string lang { get; set; }

    public string value { get; set; }

}

​

public class Error

{

    public int code { get; set; }

    public Message message { get; set; }

}

​

public class Root

{

    public Error error { get; set; }

}

​