using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var data = @"{

    'Property1': [{

        'items': [{

            'b': 1,

            'Q': 'data'

        }, {

            'b': 2,

            'Q': 'more data'

        }],

        'seconds_ago': 1

    }]

}";

        Rootobject deserializedObject = JsonConvert.DeserializeObject<Rootobject>(data);

        Console.WriteLine(deserializedObject.Property1[0].items[0].b);

        Console.WriteLine(deserializedObject.Property1[0].items[0].Q);

        Console.WriteLine(deserializedObject.Property1[0].items[1].b);

        Console.WriteLine(deserializedObject.Property1[0].items[1].Q);

        Console.WriteLine(deserializedObject.Property1[0].seconds_ago);

    }

}

​

public class Rootobject

    {

        public Class1[] Property1 { get; set; }

    }

​

    public class Class1

    {

        public Item[] items { get; set; }

        public int seconds_ago { get; set; }

    }

​

    public class Item

    {

        public int b { get; set; }

        public string Q { get; set; }

    }

​