获取指定AD组的所有用户仅返回一个用户

using System;
using System.DirectoryServices;

public class ADHelper
{
    public static string GetFirstUserInADGroup(string groupName)
    {
        string domainPath = "LDAP://yourdomain.com"; // 替换为你的域名
        string groupPath = $"{domainPath}/CN={groupName},OU=Groups,DC=yourdomain,DC=com"; // 替换为你的组路径

        DirectoryEntry groupEntry = new DirectoryEntry(groupPath);
        DirectorySearcher groupSearcher = new DirectorySearcher(groupEntry);

        groupSearcher.Filter = "(objectClass=user)";
        groupSearcher.PropertiesToLoad.Add("samaccountname");

        SearchResultCollection searchResults = groupSearcher.FindAll();

        if (searchResults.Count > 0)
        {
            SearchResult firstResult = searchResults[0];
            string username = firstResult.Properties["samaccountname"][0].ToString();
            return username;
        }

        return null;
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        string groupName = "YourGroupName"; // 替换为你的组名
        string username = ADHelper.GetFirstUserInADGroup(groupName);

        Console.WriteLine($"First user in group {groupName}: {username}");
    }
}