public bool Subscribe()
        {
            try
            {
                this._client.DataChangeNotification += this.ParseData;
                this._subscriptionHandles = this._client.SubscribeMultipleMonitoredItems(new[]
                    {
                    new EasyUAMonitoredItemArguments(null, this._serverEndpoint, this._statusEndpoint, this.OpcUaUpdateRate)
                });
                this.ConnectedState = true;
                return true;
            }
            catch (Exception ex)
            {
                StaticLogger.Log(this.GetType(), LoggingLevel.Error, "Error", nameof(Subscribe), ex, true);
                return false;
            }
        }