如何在WPF中动态添加详细信息行？

using System.Collections.ObjectModel;

public class MainViewModel
{
    public ObservableCollection<DetailRow> DetailRows { get; set; }

    public MainViewModel()
    {
        DetailRows = new ObservableCollection<DetailRow>();
    }

    public void AddDetailRow()
    {
        DetailRows.Add(new DetailRow { Description = "New Detail Row" });
    }
}

public class DetailRow
{
    public string Description { get; set; }
}

<DataGrid ItemsSource="{Binding DetailRows}" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Description" Binding="{Binding Description}" />
    </DataGrid.Columns>
</DataGrid>

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        DataContext = new MainViewModel();
    }
}