public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
Product product = (Product)value;
StackPanel stackPanel = new StackPanel();
stackPanel.Children.Add(new TextBlock {
Text = product.Title,
FontWeight = FontWeights.Bold
});
stackPanel.Children.Add(new TextBlock {
Text = product.By
});
return stackPanel;
}