wpf的按钮如何加载背景图片。

悬赏园豆：5 [已解决问题] 解决于 2012-11-20 14:17

<Window x:Class="WpfCoupon.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="573" Width="612">
    <Grid Height="507" Width="552">
        <Button HorizontalAlignment="Left" Margin="20,22,0,0" Name="button1" Width="128" Height="134" VerticalAlignment="Top">Button</Button>
    </Grid>
</Window>

WPF c#