public IReadOnlyList<Layer> GetSelectedLayers()

public Task<bool> ZoomToTOCSelectedLayersAsync()
{
  //Get the active map view.
  var mapView = MapView.Active;
  if (mapView == null)
    return Task.FromResult(false);

  //Zoom to the selected layers in the TOC
  var selectedLayers = mapView.GetSelectedLayers();
  return mapView.ZoomToAsync(selectedLayers);
}

public Task<bool> ZoomToTOCSelectedLayersAsync()
{
  //Get the active map view.
  var mapView = MapView.Active;
  if (mapView == null)
    return Task.FromResult(false);

  //Zoom to the selected layers in the TOC
  var selectedLayers = mapView.GetSelectedLayers();
  return mapView.ZoomToAsync(selectedLayers);
}

public Task<bool> PanToTOCSelectedLayersAsync()
{
  //Get the active map view.
  var mapView = MapView.Active;
  if (mapView == null)
    return Task.FromResult(false);

  //Pan to the selected layers in the TOC
  var selectedLayers = mapView.GetSelectedLayers();
  return mapView.PanToAsync(selectedLayers);
}