WPF: Поля списков и виртуализация

Как я делаю этот отрывок виртуализированным?

<ScrollViewer Grid.Column="1" Name="LogScroller">
    <r:NoInheritanceContentControl>
        <ListBox   Background="Black" ItemsSource="{Binding Path=ActiveLog}" >
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Grid Background="Black">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="200"></ColumnDefinition>
                            <ColumnDefinition Width="*"></ColumnDefinition>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition></RowDefinition>
                            <RowDefinition></RowDefinition>
                        </Grid.RowDefinitions>
                        <TextBlock Grid.Column="0" Grid.Row="0" Foreground="White">
                        <TextBlock >Date:</TextBlock>
                        <TextBlock  Text="{Binding Path=LogDate}"/>
                    </TextBlock>
                        <TextBlock Grid.Column="1" Grid.Row="0" Foreground="White">
                        <TextBlock >Severity:</TextBlock>
                        <TextBlock  Text="{Binding Path=Severity}"/>
                    </TextBlock>
                        <TextBlock Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="1" Foreground="LightGray" Text="{Binding Path=Message}"></TextBlock>
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.Template>
                <ControlTemplate>
                    <StackPanel Background="Black" IsItemsHost="True" >
                    </StackPanel>
                </ControlTemplate>
            </ListBox.Template>
        </ListBox>
    </r:NoInheritanceContentControl>
</ScrollViewer>