private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            Map1.MapUnit = GeographyUnit.DecimalDegree;
            Map1.CurrentExtent = new RectangleShape(-155.733, 95.60, 104.42, -81.9);

            inmLayer = new InMemoryFeatureLayer();
            inmLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            inmLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.Capital1;
            inmLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = TextStyles.Country1("Name");

            inmLayer.Open();
            inmLayer.Columns.Add(new FeatureSourceColumn("Name"));

            Feature feature1 = new Feature(0, 0); feature1.ColumnValues.Add("Name", "good0");
            Feature feature2 = new Feature(0, 20); feature2.ColumnValues.Add("Name", "good1");

            inmLayer.InternalFeatures.Add(feature1);
            inmLayer.InternalFeatures.Add(feature2);

            LayerOverlay ov = new LayerOverlay();
            ov.TileType = TileType.SingleTile;
            ov.Layers.Add(inmLayer);

            Map1.Overlays.Add(_pointsOverlay);

            Map1.Overlays.Add(ov);
            Map1.MapClick += new System.EventHandler<MapClickWpfMapEventArgs>(Map1_MapClick);
            Map1.Refresh();
        }

        LayerOverlay _pointsOverlay = new LayerOverlay() { TileType = TileType.SingleTile };
        InMemoryFeatureLayer _pointsLayer = new InMemoryFeatureLayer();
        InMemoryFeatureLayer inmLayer;
        void Map1_MapClick(object sender, MapClickWpfMapEventArgs e)
        {
            inmLayer.Open();
            var ClickedFeature = inmLayer.FeatureSource.GetFeaturesNearestTo(e.WorldLocation, Map1.MapUnit, 1, inmLayer.InternalFeatures[0].ColumnValues.Keys, 1000, DistanceUnit.Kilometer)[0];
            inmLayer.InternalFeatures.Clear();
            _pointsLayer = new InMemoryFeatureLayer();
            _pointsLayer.Open();
            _pointsLayer.Columns.Add(new FeatureSourceColumn("Name"));
            _pointsLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = TextStyles.Country1("Name");
            _pointsLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.Capital1;
            _pointsLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            _pointsLayer.InternalFeatures.Clear();
            _pointsLayer.InternalFeatures.Add(ClickedFeature);
            _pointsOverlay.Layers.Add(_pointsLayer);

            Map1.Refresh();
        }