Recursive ContainerFromItem

	if (dp != null)
		return dp;

	foreach (var item in itemsControl.Items)
	{
		var currentTreeViewItem = itemsControl.ItemContainerGenerator.ContainerFromItem(item);

		var childDp = ContainerFromItem(currentTreeViewItem as ItemsControl, value);

		if (childDp != null)
			return childDp;
	}
	return null;
}</pre>

public static class ItemsControlExtension { public static DependencyObject ContainerFromItem(this ItemsControl itemsControl, object value) { var dp = itemsControl.ItemContainerGenerator.ContainerFromItem(value);

	if (dp != null)
		return dp;

	foreach (var item in itemsControl.Items)
	{
		var currentTreeViewItem = itemsControl.ItemContainerGenerator.ContainerFromItem(item);

		var childDp = ContainerFromItem(currentTreeViewItem as ItemsControl, value);

		if (childDp != null)
			return childDp;
	}
	return null;
}

public static T ContainerFromItem&lt;T&gt;(this ItemsControl itemsControl, object value) where T : class
{
	return ContainerFromItem(itemsControl, value) as T;
}

}

public static class SelectorExtension { public static DependencyObject ContainerFromSelectedItem(Selector selector) { var selectedItem = selector.SelectedItem;

	if (selectedItem == null)
		return null;

	return selector.ContainerFromItem(selectedItem);
}

public static T ContainerFromSelectedItem&lt;T&gt;(Selector selector) where T : class
{
	return ContainerFromSelectedItem(selector) as T;
}

}

public static class TreeViewExtension { public static void ClearSelection(this TreeView treeview) { var selectedItem = ContainerFromSelectedItem<TreeViewItem>(treeview);

	if (selectedItem == null) return;

	selectedItem.IsSelected = false;

}

public static DependencyObject ContainerFromSelectedItem(this TreeView treeview)
{
	var selectedItem = treeview.SelectedItem;

	if (selectedItem == null)
		return null;

	return treeview.ContainerFromItem(selectedItem);
}

public static T ContainerFromSelectedItem&lt;T&gt;(this TreeView treeview) where T : class
{
	return ContainerFromSelectedItem(treeview) as T;
}

}