private void layers_LayerRemoved(object sender, LayerManagerEventArgs e)
{
LayerViewModel layerViewModel = layerViewModels.FirstOrDefault(l => l.WrapsLayer(e.Layer));
layerViewModels.Remove(layerViewModel);
OnPropertyChanged("Layers");
}
private void layers_LayerAdded(object sender, LayerManagerEventArgs e)
{
layerViewModels.Add(CreateViewModelFrom(e.Layer));
OnPropertyChanged("Layers");
}