Creating a XAML Resource from Code Without a Key

<TreeView.Resources>
    <HierarchicalDataTemplate DataType="{x:Type xbap:FieldPropertyInfo}"
        ItemsSource="{Binding Path=Value.Values}">
            <TextBlock Text="{Binding Path=Name}" />
    <HierarchicalDataTemplate>
</TreeView.Resources>

HierarchicalDataTemplate fieldPropertyTemplate = new HierarchicalDataTemplate("FieldProperyInfo");

fieldPropertyTemplate.ItemsSource = new Binding("Value.Values");

this.Resources.Add(null, fieldPropertyTemplate);

HierarchicalDataTemplate fieldPropertyTemplate = new
    HierarchicalDataTemplate("FieldProperyInfo");

fieldPropertyTemplate.SetBinding(
   HierarchialDataTemplate.ItemSourceProperty,
   new Binding("Value.Values");
this.Resources.Add(FieldPropertyInfo.GetType(), fieldPropertyTemplate);

this.Resources.Add(FieldPropertyInfo.GetType(), fieldPropertyTemplate);