I wonder if it is possible to bind a structure element like BorderThickness.Top to TemplatedParent's corresponding property. I have tried

```
<Border Margin="0" Padding="{TemplateBinding Padding}" BorderBrush="{TemplateBinding BorderBrush}">
    <Border.BorderThickness>
        <Thickness Left="0" Right="0" Top="{TemplateBinding BorderThickness.Top}" Bottom="{TemplateBinding BorderThickness.Bottom}"/>
    </Border.BorderThickness>
</Border>

```

The reason i want to do this is i want Left and Right to be 0 and only Top and Bottom be bound. 

Thanks in advance.