Acceleratio.SPDG.Generator.AD.GetUsersFromAD C# (CSharp) Метод

        public static List<string> GetUsersFromAD()
        {
            List<string> retVal=new List<string>();
            try
            {
                ContextType contextType = ContextType.Domain;
                string strName = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
                string domainName = strName.Split('\\')[0];

                using (PrincipalContext ctx = new PrincipalContext(contextType, domainName))
                {
                    var searchPrinciple = new UserPrincipal(ctx);
                    //searchPrinciple.EmailAddress = "*";
                    searchPrinciple.Enabled = true;

                    System.DirectoryServices.AccountManagement.PrincipalSearcher search = new PrincipalSearcher();
                    search.QueryFilter = searchPrinciple;

                    PrincipalSearchResult<Principal> results = search.FindAll();

                    StringBuilder sb = new StringBuilder();

                    foreach (UserPrincipal userPrincipal in results)
                    {
                        retVal.Add(domainName + "\\" + userPrincipal.SamAccountName);
                    }
                }
            }
            catch (Exception ex)
            {
                Errors.Log(ex);
            }
            return retVal;
        }