C#访问EXCEL，将单元格格式化为常规

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

namespace AccessExcel
{
    class Program
    {
        static void Main(string[] args)
        {
            string filePath = @"C:\path\to\your\excel\file.xlsx";
            Application excelApp = new Application();
            Workbook workbook = excelApp.Workbooks.Open(filePath);
            Worksheet worksheet = workbook.Sheets[1];
            Range range = worksheet.get_Range("A1");
            range.NumberFormat = "@";
            range.Value2 = "常规";
            workbook.Save();
            workbook.Close();
            excelApp.Quit();
        }
    }
}