how to make interactivity trigger common in wpf

Question

i wnat to make it common for multiple listboxs on my wpf window 

<i:Interaction.Triggers>

     <i:EventTrigger EventName="SelectionChanged">
                     <i:InvokeCommandAction Command="{Binding MyCommand}" CommandParameter="{Binding ElementName=employeeListBox, Path=SelectedValue}"/>
      </i:EventTrigger>
</i:Interaction.Triggers>