c#如何为图表上的每个点添加标签？(它们都不是相同的)

using System.Windows.Forms.DataVisualization.Charting;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        // 创建一个Chart控件
        Chart chart = new Chart();
        chart.Dock = DockStyle.Fill;

        // 将Chart控件添加到窗体中
        this.Controls.Add(chart);
    }
}

using System.Windows.Forms.DataVisualization.Charting;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        // 创建一个Chart控件
        Chart chart = new Chart();
        chart.Dock = DockStyle.Fill;

        // 创建一个Series对象
        Series series = new Series();
        series.ChartType = SeriesChartType.Line;

        // 添加数据点
        series.Points.AddXY(1, 10);
        series.Points.AddXY(2, 20);
        series.Points.AddXY(3, 15);

        // 将Series对象添加到Chart控件中
        chart.Series.Add(series);

        // 将Chart控件添加到窗体中
        this.Controls.Add(chart);
    }
}

using System.Windows.Forms.DataVisualization.Charting;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        // 创建一个Chart控件
        Chart chart = new Chart();
        chart.Dock = DockStyle.Fill;

        // 创建一个Series对象
        Series series = new Series();
        series.ChartType = SeriesChartType.Line;

        // 添加数据点
        DataPoint point1 = new DataPoint(1, 10);
        point1.Label = "Point 1";
        series.Points.Add(point1);

        DataPoint point2 = new DataPoint(2, 20);
        point2.Label = "Point 2";
        series.Points.Add(point2);

        DataPoint point3 = new DataPoint(3, 15);
        point3.Label = "Point 3";
        series.Points.Add(point3);

        // 将Series对象添加到Chart控件中
        chart.Series.Add(series);

        // 将Chart控件添加到窗体中
        this.Controls.Add(chart);
    }
}