Opc.Ua.Com.Client.ComDaGroup.RemoveItems C# (CSharp) Method

        public void RemoveItems()
        {
            // count the number of items to remove.
            List<GroupItem> itemsToRemove = new List<GroupItem>();

            lock (Lock)
            {
                List<GroupItem> itemsToKeep = new List<GroupItem>();

                for (int ii = 0; ii < m_items.Count; ii++)
                {
                    if (m_items[ii].Deleted && m_items[ii].Created)
                    {
                        itemsToRemove.Add(m_items[ii]);
                        continue;
                    }

                    itemsToKeep.Add(m_items[ii]);
                }

                m_items = itemsToKeep;
            }

            // check if nothing to do.
            if (itemsToRemove.Count == 0)
            {
                return;
            }

            // build list of items to remove.
            int count = itemsToRemove.Count;
            int[] serverHandles = new int[count];

            for (int ii = 0; ii < itemsToRemove.Count; ii++)
            {
                serverHandles[ii] = itemsToRemove[ii].ServerHandle;

                // remove the associated monitored items.
                if (m_monitoredItems != null)
                {
                    lock (m_monitoredItems)
                    {
                        m_monitoredItems.Remove(itemsToRemove[ii].ClientHandle);
                    }
                }
            }

            IntPtr pErrors = IntPtr.Zero;

            string methodName = "IOPCItemMgt.RemoveItems";

            try
            {
                IOPCItemMgt server = BeginComCall<IOPCItemMgt>(methodName, true);

                // remove items.
                server.RemoveItems(
                    count,
                    serverHandles,
                    out pErrors);
            }
            catch (Exception e)
            {
                ComUtils.TraceComError(e, methodName);

                for (int ii = 0; ii < itemsToRemove.Count; ii++)
                {
                    itemsToRemove[ii].Created = false;
                    itemsToRemove[ii].ErrorId = Marshal.GetHRForException(e);
                }

                return;
            }
            finally
            {
                EndComCall(methodName);
            }

            // free returned error array.
            int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);

            // save error codes.
            for (int ii = 0; ii < count; ii++)
            {
                itemsToRemove[ii].Created = false;
                itemsToRemove[ii].ErrorId = errors[ii];
            }

            /*
            Utils.Trace(
                "Group {0} RemoveItems({4}/{5}) {1}/{2}ms {3}%",
                m_clientHandle,
                m_samplingInterval,
                m_actualSamplingInterval,
                m_deadband,
                itemsToRemove.Count,
                m_items.Count);
            */
        }