void OnLayersCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
AddLayers(e.NewItems.Cast <Layer>().ToList());
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
RemoveLayers(e.OldItems);
}
else if (e.Action == NotifyCollectionChangedAction.Reset)
{
var layers = map.Layers;
foreach (var layer in layers)
{
if (layer.Id.HasPrefix())
{
map.RemoveLayer(layer);
}
}
}
else if (e.Action == NotifyCollectionChangedAction.Replace)
{
RemoveLayers(e.OldItems);
AddLayers(e.NewItems.Cast <Layer>().ToList());
}
}