c# 如何修改excel 文件的详细信息(作者，版本，公司名等)

Microsoft.Office.Interop.Excel 命名空间里 workbook有此类属性吗

那些都在FileInfo里面
你using System.IO就可以用了

通过nuget搜索“Free Spire.XLS”,安装，然后参考下面的代码来设置文档相关属性：

using Spire.Xls;
using System;

namespace AddProperties
{
    class Program
    {
        static void Main(string[] args)
        {
            //加载Excel文档
            Workbook workbook = new Workbook();
            workbook.LoadFromFile("test.xlsx");

            //设置摘要
            workbook.DocumentProperties.Author = "Mara";
            workbook.DocumentProperties.Title = "摘要";
            workbook.DocumentProperties.Keywords = "摘要，属性";
            workbook.DocumentProperties.Category = "展示文档";
            workbook.DocumentProperties.Company = "某某公司";
            workbook.DocumentProperties.Comments = "请勿修改";
            workbook.DocumentProperties.Subject = "测试";
            workbook.DocumentProperties.Manager = "Tom";


            //设置自定义属性
            workbook.CustomDocumentProperties.Add("_MarkAsFinal", true);
            workbook.CustomDocumentProperties.Add("联系电话", 1234567);
            workbook.CustomDocumentProperties.Add("更新时间", DateTime.Now);

            //保存文档
            workbook.SaveToFile("AddProperties.xlsx", FileFormat.Version2010);
            System.Diagnostics.Process.Start("AddProperties.xlsx");
        }
    }
}