如何通过.NET代码杀死Excel.exe？

using System;
using System.Diagnostics;

namespace KillExcel
{
    class Program
    {
        static void Main(string[] args)
        {
            KillExcelProcess();
        }

        static void KillExcelProcess()
        {
            Process[] processes = Process.GetProcessesByName("Excel");
            foreach (Process process in processes)
            {
                process.Kill();
                process.WaitForExit();
                Console.WriteLine("Excel.exe has been killed.");
            }
        }
    }
}