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    copied!<p>The code you posted is not hierarchical, In other words: The MyPOCO Class is not containing a property <code>MyCollection&lt;MYPOCO&gt;</code> Children. Here is an example for the HierarchicalDataTemplate</p> <p>Xaml:</p> <pre><code>&lt;sdk:TreeView x:Name="MyTreeView" HorizontalAlignment="Left" ItemsSource="{Binding MyCollection}" Width="200" Height="280"&gt; &lt;sdk:TreeView.ItemTemplate&gt; &lt;sdk:HierarchicalDataTemplate ItemsSource="{Binding Path=Children}"&gt; &lt;TextBlock Text="{Binding Path=Header}"/&gt; &lt;sdk:HierarchicalDataTemplate.ItemTemplate&gt; &lt;sdk:HierarchicalDataTemplate ItemsSource="{Binding Path=Children}"&gt; &lt;TextBlock Text="{Binding Path=Header}"/&gt; &lt;/sdk:HierarchicalDataTemplate&gt; &lt;/sdk:HierarchicalDataTemplate.ItemTemplate&gt; &lt;/sdk:HierarchicalDataTemplate&gt; &lt;/sdk:TreeView.ItemTemplate&gt; &lt;/sdk:TreeView&gt; </code></pre> <p>Codebehind classes:</p> <pre><code>public class MyPoco { public MyPoco(string header, int sampleChildrenCount) { this.Header = header; this.Children = new ObservableCollection&lt;MyPoco&gt;(); if (sampleChildrenCount &gt; 0) { for (int i = 0; i &lt; sampleChildrenCount; i++) { string newHeader = String.Format("Test {0}", sampleChildrenCount * i); var myPoco = new MyPoco(newHeader, sampleChildrenCount - 1) this.Children.Add(myPoco); } } } public string Header { get; set; } public ObservableCollection&lt;MyPoco&gt; Children { get; set; } } public class MyViewModel { public MyViewModel() { MyCollection = new ObservableCollection&lt;MyPoco&gt;(); for (int i = 0; i &lt; 6; i++) { this.MyCollection.Add(new MyPoco(String.Format("Test {0}", i), 5)); } } public ObservableCollection&lt;MyPoco&gt; MyCollection { get; set; } } </code></pre> <p>Codebehind startup:</p> <pre><code>public MainPage() { public MainPage() { InitializeComponent(); MyTreeView.DataContext = new MyViewModel(); } } </code></pre>
 

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