How to create MapTips at runtime

IgressT

I dynamically create Graphic layers and want to create and assign a new MapTip at runtime each time I create the layer.
The simple way of creating a new MapTip object and assigning its graphics layer property is not working (see the sample code).
Does any one how to do it?

private void GPTask_ExecuteCompleted(object sender, GPExecuteCompleteEventArgs e)
        {
            GraphicsLayer graphicslayer = new GraphicsLayer();
            graphicslayer.ID = "xyz";

            // Adding features to graphics layer
     

            // Rendering    
            graphicslayer.Renderer = cbr;

            // Refresh graphics layer
            graphicslayer.Refresh();

            this.Map.Layers.Add(graphicslayer);

            MapTip mp = new MapTip();
            mp.GraphicsLayer = graphicslayer;
            mp.TitleMember = "grid_code";
            mp.Title = "Pollution Levels";
            mp.Visibility = Visibility.Visible;

        }

AgatinoLa_Rosa

Thanks. It works.