///// <summary>
        ///// Make a CIMPointGraphic that can be added to the map overlay
        ///// </summary>
        ///// <param name="point">The location of the graphic</param>
        ///// <returns></returns>
        //internal static CIMPointGraphicHelper MakeCIMPointGraphic(PointN point)
        //{
        //    return new CIMPointGraphicHelper(point);
        //}
        /// <summary>
        /// Add a point to the specified mapview
        /// </summary>
        /// <param name="mapView">The mapview to whose overlay the graphic will be added</param>
        /// <returns>The graphic id assigned to the graphic in the overlay</returns>
        public static void AddToMapOverlay(ArcGIS.Core.CIM.PointN point, MapView mapView)
        {
            if (!mapView.Is2D)
            {
                return;//only currently works for 2D
            }
            CIMPointGraphicHelper graphicHlpr = new CIMPointGraphicHelper(point);

            graphicHlpr.graphicID             = mapView.AddOverlayGraphic(graphicHlpr.XML);
            _lookup[mapView.Map.RepositoryID] = graphicHlpr;
        }
 /// <summary>
 /// All-in-one. Update the graphic on the overlay if it was previously added
 /// otherwise, make it and add it
 /// </summary>
 /// <param name="newLocation">The new location to be added to the map</param>
 /// <param name="mapView"></param>
 /// <returns></returns>
 public static void UpdateMapOverlay(ArcGIS.Core.CIM.PointN point, MapViewInternal mapView)
 {
     if (!mapView.Is2D)
     {
         return;//only currently works for 2D
     }
     //CIMPointGraphicHelper graphicHlpr = null;
     if (_lookup.ContainsKey(mapView.Map.RepositoryID))
     {
         ////graphicHlpr = _lookup[mapView.Map.ID];
         ////graphicHlpr.UpdateLocation(point);
         ////int id = graphicHlpr.graphicID;
         ////mapView.UpdateOverlayGraphic(ref id, graphicHlpr.XML);
         ////graphicHlpr.graphicID = id;
         RemoveFromMapOverlay(mapView);
         AddToMapOverlay(point, mapView);
     }
     else
     {
         //first time
         AddToMapOverlay(point, mapView);
     }
 }