wpf Viewbox怎么才能放多个控件？？？

Question

<Grid SizeChanged="Grid_SizeChanged">
        <Viewbox>
            
        </Viewbox>
        <Path Name="p1" Fill="Black">
            <Path.Data>
                <GeometryGroup FillRule="Nonzero">
                    <PathGeometry Figures="M 1,0 L 49,0 39,10 11,10 Z" />
                    <PathGeometry Figures="M 0,1 L 0,44 10,39 10,11 Z" />
                </GeometryGroup>
            </Path.Data>
        </Path>
    </Grid>

Answer 1

        <Viewbox Margin="74,40,159,103" Name="viewbox1">
            <Grid>
                <Button>aaaaa</Button>
                <Button>bbbbbb</Button>
            </Grid>
        </Viewbox>