C#AD域怎么移动用户？

[笨山猴]

总公司 ··············部门1······综合部·····党群
·····························管理部

··············部门2·······综合部·····党群
······························管理部
小弟的公司，有个AD域，域中的组织架构如上面显示，，，如果我想把“部门2”中的“综合部”的”党群“某个人调到“部门1”的“综合部”中的”党群 “ 这个要怎么实现啊？？
我查看下，，，好像有两种方法，，
1---->是先复制用户到指定部门，然后再删除原部门的用户。
2---->直接移动用户。

求指教下，怎么实现啊？
我用的是moveto，但是老是提示错误，

  private void button4_Click(object sender, EventArgs e)

        {

                        DirectoryEntry domain = new DirectoryEntry();

 

            string domainName = "gzxinxi.com";

            domain.Path = string.Format("LDAP://{0}", domainName);

            domain.Username = "jiankong";

            domain.Password = "jiankong";

            domain.AuthenticationType = AuthenticationTypes.Secure;

            domain.RefreshCache();

 

            string commonName = textBox2.Text.Trim().ToString();

 

 

          

            DirectorySearcher deSearch = new DirectorySearcher(domain);

            deSearch.Filter = "(&(&(objectCategory=person)(objectClass=user))(cn=" + commonName + "))";

 

            SearchResult results = deSearch.FindOne();

 

 

            if (results != null)

            {

                DirectoryEntry user = results.GetDirectoryEntry();

                string first = "总公司";

                string second = "部门1";

                string third = "综合部";

                string fourth = "党群";

                string all = "LDAP://DC=gzxinxi,DC=com,OU=党群,OU=综合部,OU=部门1,OU=总公司";

 

                user.MoveTo(new DirectoryEntry(all));

                MessageBox.Show("成功");

            }

 

            else

            {

                MessageBox.Show("失败");

            }

        }