/// <summary>
        /// Get All computers
        /// </summary>
        /// <returns></returns>
        public XElement GetAllComputers()
        {
            XElement computerPrincipals = new XElement((XName)"ComputerPrincipals");

            try
            {
                ActiveDirectory.GetAllComputers(computerPrincipals);
                return(computerPrincipals);
            }
            catch (Exception ex)
            {
                throw new FaultException(ex.Message);
            }
        }