private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            ClusterPointStyle clusterPointStyle1 = new ClusterPointStyle(PointSymbolType.Triangle, new GeoSolidBrush(GeoColor.FromArgb(150, GeoColor.StandardColors.Orange)), new GeoPen(GeoColor.StandardColors.Red, 2), 27);
            ClusterPointStyle clusterPointStyle2 = new ClusterPointStyle(PointSymbolType.Cross, new GeoSolidBrush(GeoColor.FromArgb(150, GeoColor.StandardColors.Orange)), new GeoPen(GeoColor.StandardColors.Red, 2), 27);

            shpLayer = new ShapeFileFeatureLayer(@"..\..\sampledata\data\majorcities.shp");
            shpLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level04;
            shpLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(clusterPointStyle1);
            shpLayer.ZoomLevelSet.ZoomLevel05.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level06;
            shpLayer.ZoomLevelSet.ZoomLevel05.CustomStyles.Add(clusterPointStyle2);
            shpLayer.ZoomLevelSet.ZoomLevel07.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            shpLayer.ZoomLevelSet.ZoomLevel07.CustomStyles.Add(PointStyles.Capital1);
            shpLayer.Open();

            inmLayer = new InMemoryFeatureLayer();
            inmLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            inmLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.Capital3;

            LayerOverlay ovForShpLayer = new LayerOverlay();
            ovForShpLayer.Layers.Add(shpLayer);

            ovForInmLayer = new LayerOverlay();
            ovForInmLayer.Layers.Add(inmLayer);

            Map1.MapClick += new EventHandler<MapClickWpfMapEventArgs>(Map1_MapClick);
            Map1.CurrentExtent = shpLayer.GetBoundingBox();
            Map1.MapUnit = GeographyUnit.DecimalDegree;
            Map1.Overlays.Add(ovForShpLayer);
            Map1.Overlays.Add(ovForInmLayer);

            Map1.Refresh();
        }
        LayerOverlay ovForInmLayer;
        InMemoryFeatureLayer inmLayer;
        ShapeFileFeatureLayer shpLayer;
        void Map1_MapClick(object sender, MapClickWpfMapEventArgs e)
        {
            Collection<Feature> clickedFeatures = shpLayer.FeatureSource.GetFeaturesNearestTo(new PointShape(e.WorldX, e.WorldY), GeographyUnit.DecimalDegree, 1, new Collection<string>(), 10, DistanceUnit.Kilometer);
            if (clickedFeatures.Count > 0)
            {
                inmLayer.InternalFeatures.Clear();
                inmLayer.InternalFeatures.Add(clickedFeatures[0]);
            }
            Map1.Refresh();
        }