BuildItArSample.UWP.MainPage.OnNavigatedTo C# (CSharp) Method

        protected override async void OnNavigatedTo(NavigationEventArgs e)
        {
            try
            {
                base.OnNavigatedTo(e);
                displayInformation.OrientationChanged += DisplayInformation_OrientationChanged;
                if (world == null)
                {
                    InitializeWorld();
                    PopulateWorld();
                }
                
                if (cameraFeedUtility == null)
                {
                    cameraFeedUtility = new CameraFeedUtility(CameraPreview, Dispatcher);
                }
                if (world != null)
                {
                    world.StartSensors();
                    
                    await cameraFeedUtility.StartPreviewAsync(world.Rotation.ToVideoRotation());
                    world.UpdateRotation();
                    cameraFeedUtility.UpdatePreviewRotation(world.Rotation);
                }
                geolocator = new Geolocator();
                geolocator.PositionChanged += Geolocator_PositionChanged;
                var position = await geolocator.GetGeopositionAsync();
                UpdateLocation(position);
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
            }
        }