static void Main(string[] args)
{
    string jsonString = "{"party": [{"adults": 3,"children": [6,2]},{"adults": 2,"children": [9,5,2]}]}";
    JObject jObject = JObject.Parse(jsonString);
    JArray jRooms = (JArray)jObject["party"];
    string[] arrChilds = { };
    string value, name = string.Empty;
    int rooms = 0, adults = 0;
    foreach (JObject obj in jRooms.Children<JObject>())
    {
        foreach (JProperty singleProp in obj.Properties())
        {
            name = singleProp.Name;
            value = singleProp.Value.ToString();
            if (name == "children")
                arrChilds = singleProp.Value.ToString().Replace("[","").Replace("rn","").Replace("]","").Trim().Split(',');
            else
                adults += Convert.ToInt32(value);
        }
        rooms++;
    }
    Console.WriteLine("No. of rooms: {0} |t Total Adults: {1} |t Total Childrens: {2}", rooms, adults, arrChilds.Count() > 0 ? arrChilds.Count(): 0);

    //copy each index value to class property
    Console.WriteLine("Children1 : {0}", Convert.ToInt32(arrChilds[0]));
    Console.WriteLine("Children2 : {0}", Convert.ToInt32(arrChilds[1]));
    Console.WriteLine("Children3 : {0}", Convert.ToInt32(arrChilds[2]));
    Console.WriteLine("Children4 : {0}", Convert.ToInt32(arrChilds[3]));

    if(Convert.ToInt32(arrChilds.Count())>4) //if greater than 4 then put remaining count value to ExtraChild
        Console.WriteLine("ExtraChild : {0}", Convert.ToInt32(arrChilds.Count() - 4));
    Console.ReadLine();
}

class Children
{
    private int _children1;
    private int _children2;
    private int _children3;
    private int _children4;

    public int Children1
    {
        get { return _children1; }
        set { _children1 = value; }
    }
    public int Children2
    {
        get { return _children2; }
        set { _children2 = value; }
    }
    public int Children3
    {
        get { return _children3; }
        set { _children3 = value; }
    }

    public int Children4
    {
        get { return _children4; }
        set { _children4 = value; }
    }
}