//File: Page.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace SilverlightApplication3 { public partial class MainPage : UserControl { private bool isToggle; public MainPage() { InitializeComponent(); } private void button1_Click(object sender, RoutedEventArgs e) { if (isToggle == false) { textBlock1.Style = LayoutRoot.Resources["DynamicTitle"] as Style; } else { textBlock1.Style = LayoutRoot. Resources["MainTitle"] as Style; } isToggle = !isToggle; } } }