WPF中静态资源(StaticResource)和动态资源(DynamicResource)的区别

<Window x:Class=""  

        xmlns="/winfx/2006/xaml/presentation"  

        xmlns:x="/winfx/2006/xaml"  

        Title="MainWindow" Height="149" Width="296">  

    <>  

        <TextBlock x:Key="Res1" Text="海上生明月" />  

        <TextBlock x:Key="Res2" Text="海上生明月" />  

    </>  

    <StackPanel>  

        <Button Margin="5,5,5,0" Content="{StaticResource Res1}" />  

        <Button Margin="5,5,5,0" Content="{DynamicResource Res2}" />  

        <Button Margin="5,5,5,0" Content="Update" Click="UpdateRes_Click" />  

    </StackPanel>  

</Window>