C# Spire.Xls -数据表错误(添加图例键)

using Spire.Xls;

class Program
{
    static void Main(string[] args)
    {
        // 创建一个新的Excel文档
        Workbook workbook = new Workbook();
        Worksheet sheet = workbook.Worksheets[0];

        // 添加数据
        sheet.Range["A1"].Value = "Series 1";
        sheet.Range["A2"].Value = 10;
        sheet.Range["A3"].Value = 20;
        sheet.Range["A4"].Value = 30;

        sheet.Range["B1"].Value = "Series 2";
        sheet.Range["B2"].Value = 15;
        sheet.Range["B3"].Value = 25;
        sheet.Range["B4"].Value = 35;

        // 创建图表
        Chart chart = sheet.Charts.Add(ExcelChartType.ColumnClustered);
        chart.DataRange = sheet.Range["A1:B4"];

        // 添加图例项
        chart.SeriesCollection.Add(sheet.Range["A2:A4"], DataOrientation.Columns);
        chart.SeriesCollection.Add(sheet.Range["B2:B4"], DataOrientation.Columns);

        // 保存Excel文件
        workbook.SaveToFile("output.xlsx", ExcelVersion.Version2013);
    }
}