public partial class Default1 : System.Web.UI.Page
    {

        public class Main
        {
            public double temp { get; set; }
            public double temp_min { get; set; }
            public double temp_max { get; set; }
            public double pressure { get; set; }
            public double sea_level { get; set; }
            public double grnd_level { get; set; }
            public int humidity { get; set; }
            public double temp_kf { get; set; }
        }

        public class Weather
        {
            public int id { get; set; }
            public string main { get; set; }
            public string description { get; set; }
            public string icon { get; set; }
        }

        public class Clouds
        {
            public int all { get; set; }
        }

        public class Wind
        {
            public double speed { get; set; }
            public double deg { get; set; }
        }

        public class Snow
        {
            public double? __invalid_name__3h { get; set; }
        }

        public class Sys
        {
            public string pod { get; set; }
        }

        public class List
        {
            public int dt { get; set; }
            public Main main { get; set; }
            public List<Weather> weather { get; set; }
            public Clouds clouds { get; set; }
            public Wind wind { get; set; }
            public Snow snow { get; set; }
            public Sys sys { get; set; }
            public string dt_txt { get; set; }
        }

        public class Coord
        {
            public double lat { get; set; }
            public double lon { get; set; }
        }

        public class City
        {
            public int id { get; set; }
            public string name { get; set; }
            public Coord coord { get; set; }
            public string country { get; set; }
        }

        public class RootObject
        {
            public string cod { get; set; }
            public double message { get; set; }
            public int cnt { get; set; }
            public List<List> list { get; set; }
            public City city { get; set; }
        }

        public class Account
        {
            public string Email { get; set; }
            public bool Active { get; set; }
            public DateTime CreatedDate { get; set; }
            public IList<string> Roles { get; set; }
        }

        public class Deserializza
        {
            public string Active { get; set; }
            public string Email { get; set; }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            Account account = new Account
            {
                Active = true,
                Email = "miaMail@tiscali.it"
            };

            string json = JsonConvert.SerializeObject(account, Formatting.Indented);




            Deserializza deserializza = JsonConvert.DeserializeObject<Deserializza>(json);
            


           WebRequest request = WebRequest.Create("https://samples.openweathermap.org/data/2.5/forecast?id=524901&appid=mioAppID");
            request.ContentType = "application/json";
            WebResponse response = request.GetResponse();
            string jsonRicevuto = response.ToString();
            Main main = JsonConvert.DeserializeObject<Main>(jsonRicevuto);
            double prova = main.pressure;

        }



    }

cod  "200"
message  0.0036
cnt  40
list  
 0  
   dt  1485799200
   main  
     temp  261.45
     temp_min  259.086
     temp_max  261.45
     pressure  1023.48
     sea_level  1045.39
     grnd_level  1023.48
     humidity  79
     temp_kf  2.37
   weather  
     0  
      id  800
      main  "Clear"
      description  "clear sky"
      icon  "02n"
   clouds  
      ...