如何在单个Silverlight TreeView节点中拥有多种类型的子节点？

<Grid>
    <TreeView>
        <TreeView.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <TextBlock Text="{Binding NodeName}" />
                    <StackPanel.Style>
                        <Style TargetType="StackPanel">
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding NodeType}" Value="Type1">
                                    <Setter Property="Visibility" Value="Visible" />
                                    <Setter Property="Template">
                                        <Setter.Value>
                                            <ControlTemplate>
                                                <!-- Type1节点的子节点模板 -->
                                            </ControlTemplate>
                                        </Setter.Value>
                                    </Setter>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding NodeType}" Value="Type2">
                                    <Setter Property="Visibility" Value="Visible" />
                                    <Setter Property="Template">
                                        <Setter.Value>
                                            <ControlTemplate>
                                                <!-- Type2节点的子节点模板 -->
                                            </ControlTemplate>
                                        </Setter.Value>
                                    </Setter>
                                </DataTrigger>
                                <!-- 添加更多的DataTrigger来处理其他节点类型 -->
                            </Style.Triggers>
                        </Style>
                    </StackPanel.Style>
                </StackPanel>
            </DataTemplate>
        </TreeView.ItemTemplate>
    </TreeView>
</Grid>