public void RefreshMarkers(List<MarkerInfo> markers) {
     _Markers.ForEach(mmi => {
         mmi.Map = null;
     });
     _Markers = markers.Select(m => {
         MappedMarkerInfo locationMarker = new MappedMarkerInfo(m);
         locationMarker.Map = _MapView;
         return locationMarker;
     }).ToList();
 }
 public void RefreshMarkers(List <MarkerInfo> markers)
 {
     _Markers.ForEach(mmi => {
         mmi.Map = null;
     });
     _Markers = markers.Select(m => {
         MappedMarkerInfo locationMarker = new MappedMarkerInfo(m);
         locationMarker.Map = _MapView;
         return(locationMarker);
     }).ToList();
 }