private async void imgFoto_Tapped(object sender, TappedRoutedEventArgs e)
        {
            try
            {
                IRandomAccessStream fileStream;
                FileOpenPicker      openPicker = new FileOpenPicker();
                openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
                openPicker.ViewMode = PickerViewMode.Thumbnail;
                openPicker.FileTypeFilter.Clear();
                openPicker.FileTypeFilter.Add(".png");
                openPicker.FileTypeFilter.Add(".jpeg");
                openPicker.FileTypeFilter.Add(".jpg");

                StorageFile file = await openPicker.PickSingleFileAsync();

                if (file != null)
                {
                    fileStream = await file.OpenAsync(FileAccessMode.Read);

                    fotoBytes = await Convertidor.ConvertImageToBytes(fileStream);

                    bimgBitmapImage.SetSource(fileStream);
                    imgFoto.Source = bimgBitmapImage;
                }
                lblTexto.Focus(FocusState.Programmatic);
            }
            catch (Exception ex)
            {
                Helper.MensajeOk(ex.Message);
            }
        }