private void MyDrawObject_DrawComplete(object sender, ESRI.ArcGIS.Client.DrawEventArgs args)
{
myDrawObject.IsEnabled = false;
Graphic waypointGraphic = new Graphic()
{
Geometry = args.Geometry as MapPoint,
Symbol = LayoutRoot.Resources["UserStopSymbol"] as Symbol
};
waypointGraphic.Attributes.Add("StopNumber", waypointGraphicsLayer.Graphics.Count + 1);
waypointGraphicsLayer.Graphics.Add(waypointGraphic);
if (waypointGraphicsLayer.Graphics.Count > 1)
RouteButton.IsEnabled = true;
else
RouteButton.IsEnabled = false;
}