AnyPlace.MainPage.GetPoisByFloor C# (CSharp) Method

        private async void GetPoisByFloor(string build, string floor)
        {
            loading.Visibility = Visibility.Visible;
            loading.IsIndeterminate = true;
            poisByFloor_layer = new MapLayer();
            if (Mymap.Layers.Contains(poisByFloor_layer))
                Mymap.Layers.Remove(poisByFloor_layer);
            try
            {
                _y = await CustomPushpinWp8APIClient.GetPoisByFloor(build, floor);
                foreach (var obj in _y.pois)
                {
                    if (!obj.pois_type.Equals("None"))
                    {
                        var poi = new FloorPoisDetails
                        {
                            Coordinates =
                                new GeoCoordinate(double.Parse(obj.coordinates_lat, CultureInfo.InvariantCulture), double.Parse(obj.coordinates_lon, CultureInfo.InvariantCulture)),
                            Description = obj.name,
                            Information = obj.description,
                            poiid = obj.puid,
                            poiFloor = obj.floor_number
                        };
                        if (obj.is_building_entrance != null)
                            poi.Entrange = bool.Parse(obj.is_building_entrance);
                        else
                            poi.Entrange = false;

                        var imageFloorPois = new Image
                        {
                            Source = new BitmapImage(new Uri("/Assets/other_loc.png", UriKind.Relative)),
                            DataContext = poi
                        };
                        imageFloorPois.Tap += image_floor_pois_Tap;

                        poisbyflooroverlay = new MapOverlay
                        {
                            Content = imageFloorPois,
                            GeoCoordinate = poi.Coordinates,
                            PositionOrigin = new Point(0.5, 1.0)
                        };
                        poisByFloor_layer.Add(poisbyflooroverlay);
                    }
                }
                Mymap.Layers.Add(poisByFloor_layer);
            }
            catch
            {
                loading.Visibility = Visibility.Collapsed;
                loading.IsIndeterminate = false;
                downloading.Visibility = Visibility.Collapsed;
                MessageBox.Show("Can not load floor pois. Please check your connection and try again!");
            }
            loading.Visibility = Visibility.Collapsed;
            loading.IsIndeterminate = false;
            downloading.Visibility = Visibility.Collapsed;
        }