C#导出为Excel格式无效

using System;
using System.IO;
using Microsoft.Office.Interop.Excel;

public void ExportToExcel(string[] data, string fileName)
{
    Application excel = new Application();
    Workbook workbook = excel.Workbooks.Add();
    Worksheet worksheet = workbook.ActiveSheet;

    for (int i = 0; i < data.Length; i++)
    {
        worksheet.Cells[i + 1, 1] = data[i];
    }

    workbook.SaveAs(fileName);
    workbook.Close();
    excel.Quit();
}

using OfficeOpenXml;
using System.IO;

public void ExportToExcel(string[] data, string fileName)
{
    FileInfo fileInfo = new FileInfo(fileName);
    using (ExcelPackage package = new ExcelPackage(fileInfo))
    {
        ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Sheet1");
        for (int i = 0; i < data.Length; i++)
        {
            worksheet.Cells[i + 1, 1].Value = data[i];
        }
        package.Save();
    }
}