WPF TreeView multiple itemsSource - wpf

Question

I want to display the following using a wpf TreeView:
My objects are different, there is no Base class or Interface, I must define a HierarchicalDataTemplate for each item, STOP for example I can add just one ItemSource "Deliveries" but I want to add the pickups also for this stop.
<!-- DELIVERY-->
<DataTemplate x:Key="DeliveryDataTemplate">
<StackPanel Orientation="Horizontal">
<TextBlock Text="DeliveryId" Margin="3,3" />
<TextBlock Text="{Binding DeliveryStatus}" VerticalAlignment="Center" Margin="5" />
<TextBlock Background="{Binding StopStatus, Converter={StaticResource StatusConverter}}" Width="16" Height="16" />
</StackPanel>
</DataTemplate>
<!-- STOP -->
<HierarchicalDataTemplate x:Key="StopTemplate"
ItemsSource="{Binding Deliveries}"
ItemTemplate="{StaticResource DeliveryTemplate}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Stop" Margin="3,3" />
<TextBlock Text="{Binding StopId}" Margin="3,3" />
<TextBlock Background="{Binding StopStatus, Converter={StaticResource StatusConverter}}" Width="16" Height="16" Margin="3,3" />
</StackPanel>
</HierarchicalDataTemplate>
<!-- ROUTE -->
<HierarchicalDataTemplate x:Key="RouteTemplate"
ItemsSource="{Binding Stops}"
ItemTemplate="{StaticResource StopTemplate}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Route" Margin="5,5" />
<TextBlock Text="{Binding RouteId}" Margin="5,5" />
<TextBlock Background="{Binding RouteStatus, Converter={StaticResource StatusConverter}}" Width="16" Height="16" Margin="5,5" />
</StackPanel>
</HierarchicalDataTemplate>
I have a collection of Routes, each Route has Stops, each Stop has Deliveries and Pickups, each Delivery has its items each item has its own items and so on... How to solve this?

Answer 1

This sounds like a heterogenous datasource problem. I think this solution might be what you are looking for.

Answer 2

I like this answer because it need some very short codes.
WPF Treeview Databinding Hierarchal Data with mixed types
And you might need reading this question to import the System.Windows.Data.ObservableCollection Class. To be short, it can only be imported in a Wpf Library or so, not in a normal .net Class Library.
Cannot Import System.Windows.Data