WPF Add a Border to a TextBlock

Is it possible to add a border to a textblock. I need it to be added in the setter property below code:

<Style x:Key="notCalled" TargetType="{x:Type TextBlock}">
    <Setter Property="Margin" Value="2,2,2,2" />
    <Setter Property="Background" Value="Transparent" />
</Style>