System.Security.PermissionListSet.AppendZoneOrigin C# (CSharp) Method

        private void AppendZoneOrigin(ZoneIdentityPermission z, UrlIdentityPermission u)
        {

            if (z != null)
            {
                if (m_zoneList == null)
                    m_zoneList = new ArrayList();
                m_zoneList.Add( z.SecurityZone );
            }

            if (u != null)
            {
                if (m_originList == null)
                    m_originList = new ArrayList();
                m_originList.Add( u.Url );
            }
        }