public class ViewModel : INotifyPropertyChanged
    {
        #region Propiedades
        private string _stationName;
        private int _elevation;
        private string _temperature;
        private int _humidity;

        public string StationName
        { get
            {
                return _stationName;
            }
           set
            {
                _stationName = value;
                OnPropertyChanged();
            }
        }
        public int Elevation
        {
            get
            {
                return _elevation;
            }
            set
            {
                _elevation = value;
                OnPropertyChanged();
            }
        }
        public string Temperature
        {
            get
            {
                return _temperature;
            }
            set
            {
                _temperature = value;
                OnPropertyChanged();
            }
        }
        public int Humidity
        {
            get
            {
                return _humidity;
            }
            set
            {
                _humidity = value;
                OnPropertyChanged();
            }
        }
        #endregion
        #region Metodos
        public async Task GetWeatherAsync(string url)
        {
            var client = new HttpClient();
            client.BaseAddress = new Uri(url);
            var response = await client.GetAsync(client.BaseAddress);
            response.EnsureSuccessStatusCode();
            var jsonResult = response.Content.ReadAsStringAsync().Result;
            var weather = JsonConvert.DeserializeObject<WeatherResult>(jsonResult);
            SetValue(weather);
        }
        private void SetValue(WeatherResult weather)
        {
            var stationName = weather.weatherObservation.StationName;
            var elevation = weather.weatherObservation.Elevation;
            var temperature = weather.weatherObservation.Temperature;
            var humidity = weather.weatherObservation.Humidity;

            StationName = stationName;
            Elevation = elevation;
            Temperature = temperature;
            Humidity = humidity;

        }
        #endregion
        #region InotifyPropertyChanged
        public event PropertyChangedEventHandler PropertyChanged;

        [NotifyPropertyChangedInvocator]
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName=null)
        {
            if (PropertyChanged != null)
            {

                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #endregion
    }