adobject = myLdapConnection.Children.Add(value, type);

//string username = "CN=testuser,CN=Users,DC=ad,DC=domain,DC=com";
//string username = "testuser";
//string username = "AD\testuser";

//string server="LDAP://10.10.10.10:389";
//string server="LDAP://10.10.10.10";

string server = "LDAP://10.67.146.254:389";
string basedn = "ou=testou,DC=ad,DC=domain,DC=com";
string username = "CN=testuser,CN=Users,DC=ad,DC=domain,DC=com";
string password="plaintextpassword";
DirectoryEntry ldapConnection = new DirectoryEntry(server+"/"+basedn,username,password,AuthenticationTypes.Secure);
string value="ou=testsubou,ou=testou,DC=ad,DC=domain,DC=com";
string type="organizationalUnit";
DirectoryEntry adobject = myLdapConnection.Children.Add(
                                   value, type);
adobject.CommitChanges();