c#互操作Excel关闭实例

using System;
using Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;

namespace ExcelInteropExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建Excel应用程序对象
            Application excelApp = new Application();

            // 打开Excel工作簿
            Workbook workbook = excelApp.Workbooks.Open("C:\\path\\to\\your\\excel.xlsx");

            // 操作Excel工作簿
            Worksheet worksheet = workbook.Worksheets[1];
            Range range = worksheet.Range["A1"];
            range.Value = "Hello, World!";

            // 关闭Excel工作簿
            workbook.Close(SaveChanges: true);

            // 释放资源
            Marshal.ReleaseComObject(range);
            Marshal.ReleaseComObject(worksheet);
            Marshal.ReleaseComObject(workbook);
            Marshal.ReleaseComObject(excelApp);

            // 设置对象为null
            range = null;
            worksheet = null;
            workbook = null;
            excelApp = null;

            // 垃圾回收
            GC.Collect();
            GC.WaitForPendingFinalizers();

            Console.WriteLine("Excel instance closed successfully.");
            Console.ReadLine();
        }
    }
}