I am using MVVM binding an ObservableCollection of children to an ItemsControl. The ItemsControl contains a UserControl used to style the UI for the children.

<ItemsControl  ItemsSource="{Binding Documents}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>      
            <View:DocumentView Margin="0, 10, 0, 0" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

I want to show a header row for the contents of the ItemsControl but only want to show this once at the top (not for every child). How can I implement this behaviour in the DocumentView user control? Fyi I am using a Grid layout to style the child rows:

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="34"/>
        <ColumnDefinition Width="100"/>
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="60" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition />   
        <RowDefinition />
    </Grid.RowDefinitions>
    <TextBlock Grid.ColumnSpan="4" Grid.Row="0" Text="Should only show this at the top"></TextBlock>
    <Image Grid.Column="0" Grid.Row="1" Height="24" Width="24" Source="/Beazley.Documents.Presentation;component/Icons/error.png"></Image>        
    <ComboBox Grid.Column="1" Grid.Row="1" Name="ContentTypes" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type View:MainView}}, Path=DataContext.ContentTypes}" SelectedValue="{Binding ContentType}"/>
    <TextBox Grid.Column="2" Grid.Row="1" Text="{Binding Path=FileName}"/>
    <Button Grid.Column="3" Grid.Row="1"
        Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type View:MainView}}, Path=DataContext.RemoveFile}"
        CommandParameter="{Binding}">Remove</Button>
</Grid>