AnyPlace.MainPage.GetNavigationRoutesBuilding C# (CSharp) Method

        private async void GetNavigationRoutesBuilding(string buid, string puid, string floorNumber, string lat, string lon)
        {
            try
            {
                if (gd_result.Visibility == Visibility.Visible)
                    gd_result.Visibility = Visibility.Collapsed;
                if (Mymap.Layers.Contains(indoorLayer))
                    Mymap.Layers.Remove(indoorLayer);
                if (Mymap.Layers.Contains(floorPoisDetail))
                {
                    Mymap.Layers.Remove(floorPoisDetail);
                    floorPoisDetail.Clear();
                }
                Mymap.Layers.Remove(mapHoldLayer);
                ApplicationBar.IsVisible = false;
                MoveViewWindow(-70);
                stackpanelOpen();
                directions_grid.Visibility = Visibility.Visible;
                calcProgrBar.Visibility = Visibility.Visible;
                time.Visibility = Visibility.Collapsed;
                distance.Visibility = Visibility.Collapsed;
                calcProgrBar.IsIndeterminate = true;

                RouteLocationToPoi x;
                var isNetwork = NetworkInterface.GetIsNetworkAvailable();
                if (isNetwork)
                    x = await CustomPushpinWp8APIClient.GetLocationToPoiRoute(buid, puid, floorNumber, lat, lon);
                else
                {
                    MessageBox.Show("No internet connection found. Check your internet connection and try again!");
                    directions_grid.Visibility = Visibility.Collapsed;
                    stackpanelClose();
                    MoveViewWindow(30);
                    ApplicationBar.IsVisible = true;
                    return;
                }

                _polyline = new MapPolyline { StrokeColor = Colors.Blue, StrokeThickness = 5 };

                foreach (var obj in x.pois)
                {
                    _polyline.Path.Add(new GeoCoordinate(double.Parse(obj.lat, CultureInfo.InvariantCulture), double.Parse(obj.lon, CultureInfo.InvariantCulture)));
                }
                // clear route details
                if (Mymap.Layers.Contains(routedetails_layer))
                    Mymap.Layers.Remove(routedetails_layer);

                // clear directions
                if (GetRoute.Count != 0)
                {
                    GetRoute.Clear();
                    if (_myMapRoute != null)
                        Mymap.RemoveRoute(_myMapRoute);
                }

                // na dixnei ta results
                IndoorNavigationRoutesLocationToPoi();


                Mymap.MapElements.Add(_polyline);
            }
            catch
            {
                directions_grid.Visibility = Visibility.Collapsed;
                stackpanelClose();
                MoveViewWindow(30);
                ApplicationBar.IsVisible = true;
                MessageBox.Show("Can not get navigation route inside building. Please check your internet connection!");
            }

        }