wpf - 如何将相同的边距应用于面板中的所有元素？

<Grid ColumnDefinitions="*,*">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="*" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <Button Grid.Column="0" Grid.Row="1" Content="Button 1" />
    <Button Grid.Column="1" Grid.Row="1" Content="Button 2" />
    <Button Grid.Column="0" Grid.Row="2" Content="Button 3" />
    <Button Grid.Column="1" Grid.Row="2" Content="Button 4" />
</Grid>

<StackPanel Orientation="Horizontal" Margin="5">
    <Button Content="Button 1" />
    <Button Content="Button 2" />
    <Button Content="Button 3" />
    <Button Content="Button 4" />
</StackPanel>