Opc.Ua.Com.Server.ComDaBrowseManager.BrowseUp C# (CSharp) Method

        public void BrowseUp(Session session)
        {
            TraceState("BrowseUp");

            // find the id of the current node.
            string itemId = null;
                       
            lock (m_lock)
            {
                // check if already at root.
                if (m_browsePosition == null || String.IsNullOrEmpty(m_browsePosition.ItemId))
                {
                    throw ComUtils.CreateComException(ResultIds.E_FAIL);
                }

                itemId = m_browsePosition.ItemId;
            }

            // find the parent - revert to root if parent does not exist.
            ComDaBrowseElement parent = m_cache.FindParent(session, itemId);
            
            lock (m_lock)
            {
                m_browsePosition = parent; 
            }
        }