AD-角色基础授权是指在Active Directory中对角色进行基本的授权管理。以下是一个示例代码，展示如何使用C#和System.DirectoryServices命名空间来实现AD-角色基础授权：

using System;
using System.DirectoryServices;

namespace ADRoleAuthorization
{
    class Program
    {
        static void Main(string[] args)
        {
            // 设置AD的连接信息
            string domain = "yourdomain.com";
            string username = "yourusername";
            string password = "yourpassword";

            // 创建一个新的安全组
            string groupName = "TestGroup";
            CreateSecurityGroup(domain, groupName);

            // 将用户添加到安全组中
            string userDistinguishedName = "CN=TestUser,CN=Users,DC=yourdomain,DC=com";
            AddUserToGroup(domain, groupName, userDistinguishedName);

            // 授予安全组的角色基础授权
            string roleDistinguishedName = "CN=Read-only,CN=Roles,DC=yourdomain,DC=com";
            GrantRoleAuthorization(domain, groupName, roleDistinguishedName);

            Console.WriteLine("AD-角色基础授权已完成。");
            Console.ReadLine();
        }

        static void CreateSecurityGroup(string domain, string groupName)
        {
            try
            {
                DirectoryEntry directoryEntry = new DirectoryEntry("LDAP://" + domain);
                DirectoryEntry group = directoryEntry.Children.Add("CN=" + groupName, "group");
                group.Properties["sAmAccountName"].Value = groupName;
                group.CommitChanges();
                group.Close();
                directoryEntry.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        static void AddUserToGroup(string domain, string groupName, string userDistinguishedName)
        {
            try
            {
                DirectoryEntry directoryEntry = new DirectoryEntry("LDAP://" + domain);
                DirectoryEntry group = directoryEntry.Children.Find("CN=" + groupName, "group");
                group.Invoke("Add", new object[] { userDistinguishedName });
                group.CommitChanges();
                group.Close();
                directoryEntry.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        static void GrantRoleAuthorization(string domain, string groupName, string roleDistinguishedName)
        {
            try
            {
                DirectoryEntry directoryEntry = new DirectoryEntry("LDAP://" + domain);
                DirectoryEntry group = directoryEntry.Children.Find("CN=" + groupName, "group");
                
                // 获取角色基础授权属性
                PropertyValueCollection roleCollection = group.Properties["msDS-AllowedToDelegateTo"];

                // 如果属性不存在，则创建一个新的属性
                if (roleCollection == null)
                {
                    group.Properties["msDS-AllowedToDelegateTo"].Add(roleDistinguishedName);
                }
                else
                {
                    // 将角色基础授权添加到现有属性中
                    roleCollection.Add(roleDistinguishedName);
                }

                group.CommitChanges();
                group.Close();
                directoryEntry.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }
}

请注意，这只是一个示例代码，你需要根据你的实际情况进行调整。确保替换yourdomain.com、yourusername、yourpassword、TestGroup、TestUser、CN=Read-only,CN=Roles,DC=yourdomain,DC=com等参数为你自己的值。