Wpf - insert value into combobox in button click event

comboBox.Items.Add(name);

private async void Button_Click(object sender, RoutedEventArgs e)
{
   await QueuedTask.Run(() =>
   {
	   var mapView = MapView.Active;
	   var featureNames = new List<string>();
	   var featureLayers = mapView.Map.GetLayersAsFlattenedList()
		   .OfType<BasicFeatureLayer>().ToList();
	   var featureLayersWithSel = featureLayers
		   .Where(fl => fl.GetSelection().GetCount() > 0).ToList();
	   foreach (var featureLayerWithSel in featureLayersWithSel)
	   {
		   var featureName = featureLayerWithSel.Name;
		   featureNames.Add(featureName);
	   }

	   foreach (var name in featureNames)
	   {
		   comboBox.Items.Add(name);
	   }
   });
}