如何在组合框中显示两个displaymemeber和一个选定的值路径c# wpf只留下一个

public class ItemModel
{
    public string DisplayMember1 { get; set; }
    public string DisplayMember2 { get; set; }
    public string SelectedValuePath { get; set; }
}

<ComboBox x:Name="comboBox" ItemsSource="{Binding ItemList}" />

public ObservableCollection<ItemModel> ItemList { get; set; }

public MainWindow()
{
    InitializeComponent();
    DataContext = this;

    ItemList = new ObservableCollection<ItemModel>();
    // 添加ItemModel对象到ItemList集合中
    ItemList.Add(new ItemModel { DisplayMember1 = "Item 1", DisplayMember2 = "Item A", SelectedValuePath = "Value1" });
    ItemList.Add(new ItemModel { DisplayMember1 = "Item 2", DisplayMember2 = "Item B", SelectedValuePath = "Value2" });
    // ...
}

<ComboBox x:Name="comboBox" ItemsSource="{Binding ItemList}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding DisplayMember1}" />
                <TextBlock Text=" - " />
                <TextBlock Text="{Binding DisplayMember2}" />
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

<ComboBox x:Name="comboBox" ItemsSource="{Binding ItemList}" SelectedValuePath="{Binding SelectedValuePath}" />