给StackPanel的子元素添加padding

<StackPanel>

    <StackPanel.Resources>

        <Style TargetType="{x:Type TextBox}">

            <Setter Property="Margin" Value="0,10,0,0"/>

        </Style>

    </StackPanel.Resources> 

    <TextBox Text="Apple"/>

    <TextBox Text="Banana"/>

    <TextBox Text="Cherry"/>

</StackPanel>