private void RemovePointsOfInterestOfRemovedLayer(BikeTouringGISLayer obj)
        {
            var source = obj.FileName;
            var layersWithSameSource = BikeTouringGISLayers.Any(x => x.FileName.Equals(source) && x.Type == LayerType.GPXRoute);

            if (!layersWithSameSource)
            {
                var wayPointsToRemove = _pointsOfInterestLayer.WayPoints.Where(x => x.Source.Equals(source)).ToList();
                _pointsOfInterestLayer.RemovePoIs(wayPointsToRemove);
            }
        }
        private void RemoveLayer(BikeTouringGISLayer obj)
        {
            var splitLayer = obj.SplitLayer;

            _map.Layers.Remove(obj);
            _map.Layers.Remove(splitLayer);
            BikeTouringGISLayers.Remove(obj);
            RemovePointsOfInterestOfRemovedLayer(obj);
            SetExtent();
            CalculateTotalLength();
            PlacePointsOfInterestLayerOnTop();
            MessengerInstance.Send(new LayerRemovedMessage()
            {
                Layer = obj
            });
        }