如何使用C#和DocumentFormat.OpenXml nuget软件包在Excel中格式化数字？

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

class Program
{
    static void Main()
    {
        // 创建一个新的Excel文档
        using (SpreadsheetDocument document = SpreadsheetDocument.Create("example.xlsx", SpreadsheetDocumentType.Workbook))
        {
            // 添加一个Workbook部件到文档
            WorkbookPart workbookPart = document.AddWorkbookPart();
            workbookPart.Workbook = new Workbook();

            // 添加一个Worksheet部件到Workbook部件
            WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>();
            worksheetPart.Worksheet = new Worksheet(new SheetData());

            // 添加一个Sheets部件到Workbook部件
            Sheets sheets = workbookPart.Workbook.AppendChild(new Sheets());
            Sheet sheet = new Sheet() { Id = workbookPart.GetIdOfPart(worksheetPart), SheetId = 1, Name = "Sheet1" };
            sheets.Append(sheet);

            // 获取Worksheet部件的SheetData
            SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();

            // 创建一个Cell并添加到SheetData中
            Cell cell = new Cell() { DataType = CellValues.Number, CellValue = new CellValue("12345") };
            sheetData.AppendChild(new Row(new Cell()));

            // 设置单元格的格式化样式
            Stylesheet stylesheet = workbookPart.WorkbookStylesPart.Stylesheet;
            CellFormats cellFormats = stylesheet.CellFormats;
            UInt32Value numberFormatId = InsertNumberFormat(stylesheet, "#,##0.00");
            cell.StyleIndex = InsertCellStyle(cellFormats, numberFormatId);

            // 保存并关闭Excel文档
            workbookPart.Workbook.Save();
            document.Close();
        }
    }

    // 插入一个自定义的数字格式化样式
    private static UInt32Value InsertNumberFormat(Stylesheet stylesheet, string formatCode)
    {
        NumberingFormats numberingFormats = stylesheet.NumberingFormats;
        UInt32Value numberFormatId = (UInt32Value)numberingFormats.Count + 164;

        NumberingFormat numberingFormat = new NumberingFormat() { NumberFormatId = numberFormatId, FormatCode = formatCode };
        numberingFormats.Append(numberingFormat);

        return numberFormatId;
    }

    // 插入一个自定义的单元格样式
    private static UInt32Value InsertCellStyle(CellFormats cellFormats, UInt32Value numberFormatId)
    {
        UInt32Value styleIndex = (UInt32Value)cellFormats.Count;

        CellFormat cellFormat = new CellFormat() { NumberFormatId = numberFormatId };
        cellFormats.Append(cellFormat);

        return styleIndex;
    }
}