如何获取windows通用帐户列表的AD属性？

using System;
using System.DirectoryServices;

class Program
{
    static void Main()
    {
        // 连接到AD服务器
        DirectoryEntry entry = new DirectoryEntry("LDAP://YourADServer");

        // 创建LDAP查询
        DirectorySearcher searcher = new DirectorySearcher(entry);
        searcher.Filter = "(objectCategory=user)";

        // 执行查询
        SearchResultCollection results = searcher.FindAll();

        // 遍历结果并输出属性
        foreach (SearchResult result in results)
        {
            DirectoryEntry user = result.GetDirectoryEntry();
            Console.WriteLine("帐户名称: " + user.Properties["samAccountName"].Value);
            Console.WriteLine("电子邮件地址: " + user.Properties["mail"].Value);
            Console.WriteLine("电话号码: " + user.Properties["telephoneNumber"].Value);
            Console.WriteLine("-----------------------------------");
        }

        // 清理资源
        entry.Dispose();
        searcher.Dispose();
    }
}