<UserControl x:Class="Views.Node"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:this="clr-namespace:Views"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <ItemsControl ItemsSource="{Binding Path=Childrens}">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <this:Node />
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
    </Grid>
</UserControl>

<Node DataContext="{Binding Path=RootNode}" />