如何在WPF工具包图表中的特定数据点添加垂直线

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf">
    <Grid>
        <lvc:CartesianChart Name="chart">
            <!-- Add series and axis here -->
        </lvc:CartesianChart>
    </Grid>
</Window>

using LiveCharts;
using LiveCharts.Wpf;

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        
        // Create a SeriesCollection to store data
        SeriesCollection seriesCollection = new SeriesCollection();
        
        // Add series to the collection
        seriesCollection.Add(new LineSeries
        {
            Title = "Series 1",
            Values = new ChartValues<double> { 1, 3, 2, 4, 5 } // Replace with your data
        });
        
        // Set the SeriesCollection as the chart's data context
        chart.Series = seriesCollection;
    }
}

using LiveCharts;
using LiveCharts.Wpf;

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        
        // Create a SeriesCollection to store data
        SeriesCollection seriesCollection = new SeriesCollection();
        
        // Add series to the collection
        seriesCollection.Add(new LineSeries
        {
            Title = "Series 1",
            Values = new ChartValues<double> { 1, 3, 2, 4, 5 } // Replace with your data
        });
        
        // Add vertical line annotation at a specific data point
        chart.Annotations.Add(new VerticalLineAnnotation
        {
            X = 2, // Index of the data point where the line should be added
            Stroke = Brushes.Red,
            StrokeThickness = 2
        });
        
        // Set the SeriesCollection as the chart's data context
        chart.Series = seriesCollection;
    }
}