Opc.Ua.Sample.SampleNodeManager.DeleteMonitoredItem C# (CSharp) Method

        protected virtual ServiceResult DeleteMonitoredItem(
            ISystemContext context,
            IMonitoredItem monitoredItem,
            out bool processed)
        {
            processed = false;

            // check for valid handle.
            MonitoredNode monitoredNode = monitoredItem.ManagerHandle as MonitoredNode;

            if (monitoredNode == null)
            {
                return ServiceResult.Good;
            }

            if (IsHandleInNamespace(monitoredNode.Node) == null)
            {
                return ServiceResult.Good;
            }

            // owned by this node manager.
            processed = true;

            // get the  source.
            NodeState source = monitoredNode.Node;

            // check for valid monitored item.
            DataChangeMonitoredItem datachangeItem = monitoredItem as DataChangeMonitoredItem;
            
            // check if the variable needs to be sampled.
            if (datachangeItem.AttributeId == Attributes.Value)
            {
                BaseVariableState variable = monitoredNode.Node as BaseVariableState;

                if (variable.MinimumSamplingInterval > 0)
                {
                    DeleteSampledItem(datachangeItem);
                }
            }

            // remove item.
            monitoredNode.DeleteItem(datachangeItem);

            // do any post processing.
            OnDeleteMonitoredItem(context, monitoredNode, datachangeItem);

            return ServiceResult.Good;
        }