private async void OnBrowseFilesButtonClicked(object sender, RoutedEventArgs e)
        {
            StorageFile selectedFile = await Util.PickSingleFileAsync(SpeakerRecognitionExplorer.AudioExtensions);

            if (selectedFile != null)
            {
                LocalFileCollection.Add(selectedFile);
            }
        }
        private async void FileListView_OnDrop(object sender, DragEventArgs e)
        {
            if (e.DataView.Contains(StandardDataFormats.StorageItems))
            {
                var storageItems = await e.DataView.GetStorageItemsAsync();

                LocalFileCollection.Add(storageItems.Select(x => (StorageFile)x).FirstOrDefault());
            }
        }