using System;

using Newtonsoft.Json;

using System.Collections;           

​

public class SeuObjeto 

{   

    public SeuSubObjeto Chatters { get; set; }

}

​

public class SeuSubObjeto {

    public string[] moderators { get; set; }

    public string[] viewers { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        string json = @"{

                          '_links': {},

                          'chatter_count': 16,

                          'chatters': {

                            'moderators': ['gumagames', 'juliavidoto', 'nightbot', 'pinkpanthersz_', 'victoriia66'],

                            'staff': [],

                            'admins': [],

                            'global_mods': [],

                            'viewers': ['andreschramm', 'anotheruselessbot', 'barbosza', 'brancoxp', 'froydz1515', 'hurato2', 'luiz522', 'phoenixlabella', 'rockmam', 'sumarilion1988', 'xoverxkill']

                          }

                        }";

        var objeto = JsonConvert.DeserializeObject<SeuObjeto>(json);

        Console.WriteLine(objeto.Chatters.moderators[0]);

        Console.WriteLine(objeto.Chatters.viewers[0]);

    }

}