Windows Phone 有背景的按鈕

  <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Button Content="有背景的按鈕" HorizontalAlignment="Center" VerticalAlignment="Top" Height="auto" Padding="20">
                <Button.Background>
                    <ImageBrush ImageSource="btn_cancle_pressed.9.png" Stretch="UniformToFill"/>
                </Button.Background>
            </Button>
        </Grid>