Opc.Ua.Server.StandardServer.CloseSession C# (CSharp) Method

        public override ResponseHeader CloseSession(RequestHeader requestHeader, bool deleteSubscriptions)
        {
            OperationContext context = ValidateRequest(requestHeader, RequestType.CloseSession);

            try
            {
                ServerInternal.CloseSession(context, context.Session.Id, deleteSubscriptions);
                return CreateResponse(requestHeader, context.StringTable);
            }
            catch (ServiceResultException e)
            {
                lock (ServerInternal.DiagnosticsLock)
                {
                    ServerInternal.ServerDiagnostics.RejectedRequestsCount++;

                    if (IsSecurityError(e.StatusCode))
                    {
                        ServerInternal.ServerDiagnostics.SecurityRejectedRequestsCount++;
                    }
                }

                throw TranslateException(context, e);
            }  
            finally
            {
                OnRequestComplete(context);
            }  
        }