pGina.Plugin.LocalMachine.LocalAccount.GetGroups C# (CSharp) Method

        private static List<GroupPrincipal> GetGroups(UserPrincipal user)
        {
            List<GroupPrincipal> result = new List<GroupPrincipal>();

            // Get all groups using a PrincipalSearcher and
            GroupPrincipal filter = new GroupPrincipal(m_machinePrincipal);
            using (PrincipalSearcher searcher = new PrincipalSearcher(filter))
            {
                PrincipalSearchResult<Principal> sResult = searcher.FindAll();
                foreach (Principal p in sResult)
                {
                    if (p is GroupPrincipal)
                    {
                        GroupPrincipal gp = (GroupPrincipal)p;
                        if (LocalAccount.IsUserInGroup(user, gp))
                            result.Add(gp);
                        else
                            gp.Dispose();
                    }
                    else
                    {
                        p.Dispose();
                    }
                }
            }
            return result;
        }

        public void SyncToLocalUser()
        {
            m_logger.Debug("SyncToLocalUser()");
            using (UserPrincipal user = CreateOrGetUserPrincipal(UserInfo))
            {
                // Force password and fullname match (redundant if we just created, but oh well)
                SyncUserPrincipalInfo(user, UserInfo);

                try
                {
                    List <SecurityIdentifier> ignoredSids = new List <SecurityIdentifier>(new SecurityIdentifier[] {
                        new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null),    // "Authenticated Users"
                        new SecurityIdentifier("S-1-1-0"),                                      // "Everyone"
                    });

                    // First remove from any local groups they aren't supposed to be in
                    m_logger.Debug("Checking for groups to remove.");
                    List <GroupPrincipal> localGroups = LocalAccount.GetGroups(user);
                    foreach (GroupPrincipal group in localGroups)
                    {
                        m_logger.DebugFormat("Remove {0}?", group.Name);
                        // Skip ignored sids
                        if (!ignoredSids.Contains(group.Sid))
                        {
                            GroupInformation gi = new GroupInformation()
                            {
                                Name = group.Name, SID = group.Sid, Description = group.Description
                            };
                            if (!UserInfo.InGroup(gi))
                            {
                                m_logger.DebugFormat("Removing user {0} from group {1}", user.Name, group.Name);
                                RemoveUserFromGroup(user, group);
                            }
                        }
                        group.Dispose();
                    }

                    // Now add to any they aren't already in that they should be
                    m_logger.Debug("Checking for groups to add");
                    foreach (GroupInformation groupInfo in UserInfo.Groups)
                    {
                        m_logger.DebugFormat("Add {0}?", groupInfo.Name);
                        if (!IsUserInGroup(user, groupInfo))
                        {
                            using (GroupPrincipal group = CreateOrGetGroupPrincipal(groupInfo))
                            {
                                m_logger.DebugFormat("Adding user {0} to group {1}", user.Name, group.Name);
                                AddUserToGroup(user, group);
                            }
                        }
                    }
                }
                catch (Exception e)
                {
                    throw new GroupSyncException(e);
                }
            }
            m_logger.Debug("End SyncToLocalUser()");
        }