How to get Ua Server closed or disconnected notification in Ua Client |OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

Hello,

I am implementing Ua Client using UA-.NETStandardLibrary @ GitHub sdk, 

I can connect the Ua Server using endpoint url and created a session. Furthermore I want to detect when Ua Server disconnects from client and/or closes the Ua Server (may be by user).

I am doing following:

Session session = await Session.Create(_AppConfiguration,
configuredEndpoint,
true,
true,
_AppConfiguration.ApplicationName,
15000,
new UserIdentity(new AnonymousIdentityToken()),
null);

session.SessionClosing += OnSessionClosingHandler;

private static void OnSessionClosingHandler(object sender, EventArgs e)
{ //have inserted breakpoint to debug the execution
    //some handling – not available for instance
}

I am manually closing the connected Ua Server and expecting that the SessionClosing event will be raised and it calls the OnSessionClosingHandler method.

However, I have observed the method is not executed.  Is it a correct way that I have implemented above?  Please guide me. 

Thanks,

Jayesh