Setting MonitoringMode, for MonitoredItem object, to MonitoringMode.Disable is not stopping receiving data from server

[shiladityak]

Trying to stop receiving data by setting MonitoringMode to Disable for one MonitoredItem object. Consider the following piece of code,

var subscription = new Subscription();

MonitoredItem monItem = new MonitoriedItem((uint)1);
monItem.StartNodeId = NodeId.parse("ns=2;i=1001");
monItem.AttributeId = Attributes.Value;
monItem.SamplingInterval = -1;
monItem.DisplayName = "NodeItem1";

subscription.AddItem(monItem);

Now, I would like to stop receiving data from server for NodeItem1 monitored item. For this, using the following code snippet,

monItem.MonitoringMode = MonitoringMode.Disabled;
subscription.ApplyChanges();

This is actually, setting MonitoringMode property MonitoringMode.Disabled, but still we are receiving data from server.

How to achieve this requirement?