get altitude(elevation) from map provider

Question

Ok whats the problem ?

I want to get elevation with Google maps.

I made code

List<double> visineRuteSaGoogla = new List<double>();

            int koliko = koordinateRuteLat.Count();

            WebResponse response = null;

            StreamReader reader = null;

            string result = null;

                for (int i = 0; i < koliko; i++)

                {

                    string url = CreateRequest("" + koordinateRuteLat[i] + "," + koordinateRuteLng[i]);

                    try

                    {

                        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

                        request.Method = "GET";

                        response = request.GetResponse();

                        reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

                        result = reader.ReadToEnd();

                        dynamic m = JsonConvert.DeserializeObject<object>(result);

                        dynamic elev = m.results[0];

                        double visinaRutaTacke = elev.elevation;

                        visineRuteSaGoogla.Add(visinaRutaTacke);

                    }

                    catch (Exception ex)

                    {

                        // handle error

                        MessageBox.Show(ex.Message);

                    }

What is the problem

I keep getting a result out of range

If the query is 50 elevation, no problem

how to make multiple queries of 50

I have no idea