在AD中启用账户

private void EnableUser(DirectoryEntry  de)
{ 
int val = (int)de.Properties["userAccountControl"].Value;
                de.Properties["userAccountControl"].Value = val & ~Convert.ToInt32( ADHelper.ADS_USER_FLAG_ENUM.ADS_UF_ACCOUNTDISABLE );

                                de.CommitChanges();
de.Close;
}