C# EXCEL导出时无法应用单元格格式更改

using OfficeOpenXml;
using OfficeOpenXml.Style;

ExcelPackage excelPackage = new ExcelPackage();
ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets.Add("Sheet1");

worksheet.Cells["A1"].Value = "Hello";
worksheet.Cells["B1"].Value = "World";

worksheet.Cells["A1"].Style.Font.Bold = true;
worksheet.Cells["A1"].Style.Font.Color.SetColor(Color.Red);
worksheet.Cells["B1"].Style.Numberformat.Format = "0.00";

byte[] excelBytes = excelPackage.GetAsByteArray();
File.WriteAllBytes("path/to/save/excel.xlsx", excelBytes);