I have this code and i now want to add items to my listbox in this format, my data i'm getting is from a xml code which I'm reading from my vb.net code

Code:
<Windows.Resource>
<DataTemplate x:Key="EmployeeDataTemplate">
   <Grid>
      <Grid.ColumnDefinitions>
         <ColumnDefinition Width="60"/>
         <ColumnDefinition Width="*"/>
      </Grid.ColumnDefinitions>
   <Border Margin="5" BorderBrush="Black" BorderThickness="1">
      <Image Source="{Binding Path=Image}" Stretch="Fill" Width="50" Height="50" />
   </Border>
   <StackPanel Grid.Column="1" Margin="5">
      <StackPanel Orientation="Horizontal" TextBlock.FontWeight="Bold" >
         <TextBlock Text="{Binding Path=Firstname, FallbackValue=FirstName}" />
         <TextBlock Text="{Binding Path=Lastname, FallbackValue=LastName}" Padding="3,0,0,0"/>
      </StackPanel>
      <TextBlock Text="{Binding Path=Age, FallbackValue=Age}" />
      <TextBlock Text="{Binding Path=Role, FallbackValue=Role}" />
   </StackPanel>
  </Grid>
</DataTemplate>
</Windows.Resource>

<Listbox>
..
</Listbox>