<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Background="{x:Static SystemColors.WindowBrush}"
Name="page">
<Page.Resources>
<Style TargetType="{x:Type RadioButton}">
<Setter Property="Margin" Value="6" />
</Style>
</Page.Resources>
<StackPanel HorizontalAlignment="Center"
VerticalAlignment="Center"
Background="{DynamicResource
{x:Static SystemColors.ControlBrushKey}}">
<RadioButton Content="Red">
<RadioButton.Triggers>
<EventTrigger RoutedEvent="RadioButton.Checked">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="page"
Storyboard.TargetProperty="Background.Color"
To="Red" Duration="0:0:1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</RadioButton.Triggers>
</RadioButton>
</StackPanel>
</Page>
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