如何在单击标签时引用在xaml中创建的选取器

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <StackPanel>
            <Label Content="选择器示例" />
            <ComboBox x:Name="Selector" Width="200">
                <ComboBoxItem Content="选项1" />
                <ComboBoxItem Content="选项2" />
                <ComboBoxItem Content="选项3" />
            </ComboBox>
            <Button Content="点击我" Click="Button_Click" />
        </StackPanel>
    </Grid>
</Window>

private void Button_Click(object sender, RoutedEventArgs e)
{
    ComboBoxItem selectedItem = (ComboBoxItem)Selector.SelectedItem;
    string selectedOption = selectedItem.Content.ToString();
    MessageBox.Show("你选择了：" + selectedOption);
}