如何在wpf的组头中显示属性名称

<!-- GroupHeaderStyle -->
<Style x:Key="GroupHeaderStyle" TargetType="{x:Type GroupItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type GroupItem}">
                <Expander IsExpanded="False" Margin="15,0,0,0">
                    <Expander.Header>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding ????????????}"/>
                            <TextBlock Text="-->"/>
                            <TextBlock Text="{Binding Name}"/>
                        </StackPanel>
                    </Expander.Header>
                    <ItemsPresenter />
                </Expander>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
<!-- GroupHeaderStyle -->
<Style x:Key="GroupHe