private void sampleFileListBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{
GpxFeatureLayer shapeLayer = new GpxFeatureLayer(SampleHelper.Get(sampleFileListBox.SelectedItem.ToString()));
shapeLayer.FeatureSource.ProjectionConverter = projectionConverter;
ValueStyle pointStyle = new ValueStyle();
pointStyle.ColumnName = "IsWayPoint";
pointStyle.ValueItems.Add(new ValueItem("0", PointStyle.CreateSimplePointStyle(PointSymbolType.Circle, GeoColors.Red, 4)));
pointStyle.ValueItems.Add(new ValueItem("1", PointStyle.CreateSimplePointStyle(PointSymbolType.Circle, GeoColors.Green, 8)));
LineStyle roadstyle = LineStyle.CreateSimpleLineStyle(GeoColors.Black, 1, true);
shapeLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(pointStyle);
shapeLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(roadstyle);
shapeLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
GpxFeatureLayer textLayer = new GpxFeatureLayer(SampleHelper.Get(sampleFileListBox.SelectedItem.ToString()));
textLayer.FeatureSource.ProjectionConverter = projectionConverter;
TextStyle labelStyle = TextStyle.CreateSimpleTextStyle("name", "Arial", 8, DrawingFontStyles.Bold, GeoColors.Black);
labelStyle.TextPlacement = TextPlacement.Upper;
labelStyle.OverlappingRule = LabelOverlappingRule.NoOverlapping;
labelStyle.YOffsetInPixel = 8;
textLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(labelStyle);
textLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
shapeLayer.Open();
mapView.CurrentExtent = (shapeLayer.GetBoundingBox());
var gpsOverlay = (LayerOverlay)mapView.Overlays["GPSOverlay"];
gpsOverlay.Layers.Clear();
gpsOverlay.Layers.Add(shapeLayer);
gpsOverlay.Layers.Add(textLayer);
mapView.Refresh();
}