using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    static string tst = @"{

        ""AppName"": ""toolbelt"",

        ""AppId"": 2,

        ""UserConfig"": {

            ""DefaultModule"": {""queue"": ""none""}

        },

        ""ComputerConfig"": null

    }";

    public static void Main()

    {

        var tmp = JsonConvert.DeserializeObject<app>(tst);

        appConfig theConfig = null;

        try

        {

            theConfig = ((JObject)tmp.UserConfig["DefaultModule"]).ToObject<appConfig>();

        }

        catch (Exception ex)

        {

            Console.WriteLine(ex.Message);

        }

        Console.WriteLine(theConfig.queue);

        Console.WriteLine("done!");

        Console.ReadLine();

    }

}

​

public class appConfig 

{

    public string queue {get; set;}

}

​

public class app

{

    public string AppName {get; set;}

    public int AppId {get; set;}

    public Dictionary<string, object> UserConfig {get; set;}

    public Dictionary<string, object> ComputerConfig {get; set;}

}