Treeview vs nested Expanders

Edit 2 :

This is what i want to do with only 1 treeview :

my treeview with outlook style http://img204.imageshack.us/img204/8218/sansreju.jpg

Edit :

I want to know how make a treeview with different expander styles in terms of the level. I currently use nested expanders.

Original question :

I am trying to get a WPF Treeview that has differents expanders styles in terms of the level.

What i actually have is that :

a listview wich contains differents templates in term of the ojbect type by using a selector

<ListView Name="MyTreeView" ItemTemplateSelector="{StaticResource Selector}">

<!-- Items Template -->
<HierarchicalDataTemplate x:Key="ItemsTemplate" ItemsSource="{Binding Childrens}">
    <TextBlock Text="{Binding Name}" Margin="5,0" VerticalAlignment="Center"/>
</HierarchicalDataTemplate>

<!-- SubNode Template -->
<DataTemplate x:Key="SubNodeTemplate">
    <Expander Style="{StaticResource SubExpander}">
        <TreeView ItemsSource="{Binding Childrens}"
                  ItemTemplateSelector="{StaticResource Selector}"/>
    </Expander>
</DataTemplate>

<!-- Node Template -->
&开发者_JS百科lt;DataTemplate x:Key="NodeTemplate">
    <Expander Style="{StaticResource MainViewExpander}">
        <ListView ItemsSource="{Binding Childrens}"
                  ItemTemplateSelector="{StaticResource Selector}"/>
    </Expander>
</DataTemplate>

And this is the code behind with object used for mapping : I got a list (of IUpSlideItem ) and apply it to MyTreeview.ItemsSource

Public Interface IUpSlideItem
    Property Childrens As List(Of IUpSlideItem)
    Property Name As String
End Interface

Public Class Item
    Implements IUpSlideItem

    Public Property Childrens As System.Collections.Generic.List(Of IUpSlideItem) Implements IUpSlideItem.Childrens
    Public Property Name As String Implements IUpSlideItem.Name

End Class

Public Class Node
    Implements IUpSlideItem

    Public Property Childrens As System.Collections.Generic.List(Of IUpSlideItem) Implements IUpSlideItem.Childrens
    Public Property Name As String Implements IUpSlideItem.Name

End Class

Now the question is to know if only 1 treeview with different expander style in terms of the type's item is possible. I need this because i want single item select only.

by using an item container style selctor you can have 1 treeview with different expander style : http://msdn.microsoft.com/fr-fr/library/system.windows.hierarchicaldatatemplate.itemcontainerstyleselector%28v=vs.90%29.aspx

edit : this solution is working, i have a perfect TreeView now