WPF 中动态改变控件模板

　　　　private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            ResourceDictionary newDictionary = new ResourceDictionary();
            newDictionary.Source = new Uri("Themes/Dictionary1.xaml", UriKind.RelativeOrAbsolute);
            this.Resources.MergedDictionaries[0] = newDictionary;
        }

        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            ResourceDictionary newDictionary = new ResourceDictionary();
            newDictionary.Source = new Uri("Themes/Dictionary2.xaml", UriKind.RelativeOrAbsolute);
            this.Resources.MergedDictionaries[0] = newDictionary;
        }