修改本機iis中全部application pool的identity（OfficeServerApplicationPool除外） c#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.DirectoryServices;
using System.Collections;

namespace ResetIISApplicationIdentity
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] strusers = System.IO.File.ReadAllLines("userid.txt", System.Text.Encoding.UTF8);
            int sid = 0;
            foreach (string struser in strusers)
            {
                string[] arruser = struser.Split('|');
                string name = arruser[0];
                string pwd = arruser[1];

                DirectoryEntry appPool = new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
                try
                {
                    foreach (DirectoryEntry getdir in appPool.Children)
                    {
                        if (getdir.Name != "OfficeServerApplicationPool")
                        {
                            getdir.Properties["WAMUserName"][0] = name;
                            getdir.Properties["WAMUserPass"][0] = pwd;
                            //getdir.Properties["AppPoolIdentityType"][0] = "3";  //"3"應用程序池做爲特定用戶賬戶來運行,"0"應用程序池做爲 LocalSystem 來運行,"1"應用程序池做爲 LocalService 來運行,"2"應用程序池做爲 NetworkService 來運行。
                            getdir.CommitChanges();                           
                            Console.WriteLine(getdir.Name + "\t" + getdir.Properties["WAMUserName"][0] + "\t" + getdir.Properties["WAMUserPass"][0]);
                        }
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    return;
                }
                Console.ReadKey();
            }
        }
    }
}