Is it possible to have a hollow fill for a feature layer polygon? I have an esri basemap and a polygon feature layer. I would like to show the feature layer as hollow, so the display would show the boundaries of these polygons and the basemap would be clearly visible behind. If I set the 'Fill' property of the simple fill symbol to 'transparent' I just get a black fill. The closest I can get to my desired effect is to set the fill to a neutral color, and then set the opacity to something less than 0.5This allows the basemap to show sometwhat but then I loose the prominence of the boundaries. And the basemap becomes less readable, and the context details are very important for this application My other idea was to derive a line feature layer of the boundaries and set the polygon feature layer to be invisible. I ultimately need the user to interact with the polygon layer, deriving maptips and being able to perform selections.Is there another property of the Feature Layer that I am not aware of that lends itself to this functionality? Do I need to implement a renderer? How do I do that?Thanks.
<esri:Map x:Name="Map" Background="White" IsLogoVisible="False" Extent="{StaticResource StartExtent}" >
<esri:ArcGISTiledMapServiceLayer ID="BaseLayer" Url="http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer" />
<esri:FeatureLayer IsHitTestVisible="True" SelectionColor="Cyan" Url="http://my.." ID="Counties" Opacity="0.6" >
<esri:FeatureLayer.FeatureSymbol>
<esri:SimpleFillSymbol BorderThickness="3"/>
</esri:FeatureLayer.FeatureSymbol>
</esri:FeatureLayer>
<esri:FeatureLayer IsHitTestVisible="True" SelectionColor="Cyan" Url="http://my.." >
<esri:FeatureLayer.FeatureSymbol>
<esri:FillSymbol Fill="Transparent">
<esri:FillSymbol.BorderBrush>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FF4357C2" Offset="1"/>
</LinearGradientBrush>
</esri:FillSymbol.BorderBrush>
</esri:FillSymbol>
</esri:FeatureLayer.FeatureSymbol>
</esri:FeatureLayer>
<esri:FeatureLayer IsHitTestVisible="True" SelectionColor="Cyan" Url="http://mmsbuild.spatialsys.com/arcgis/rest/services/AllianceResidential/AllianceResidential/MapServer/0" ID="Properties" />
</esri:Map>