ArcGIS Pro SelectAllFeatureLayersInTOC

public void SelectAllFeatureLayersInTOC()
{
//Get the active map view.
var mapView = MapView.Active;
if (mapView == null)
return;

//Zoom to the selected layers in the TOC
var featureLayers = mapView.Map.Layers.OfType<FeatureLayer>();
mapView.SelectLayers(featureLayers.ToList());
}