private async Task ShowPlaces() { // Find places in this category near the current location List <Graphic> places = await _viewModel.FindPlaces(_deviceLocation); // ** Better performance using AddRange ** // https://community.esri.com/community/developers/native-app-developers/arcgis-runtime-sdk-for-net/blog/2019/10/09/improve-performance-with-addrange _placesGraphicsOverlay.Graphics.AddRange(places); }