Opc.Ua.SessionEndpoint.QueryFirst C# (CSharp) Method

        public IServiceResponse QueryFirst(IServiceRequest incoming)
        {
            QueryFirstResponse response = null;

            try
            {
                OnRequestReceived(incoming);

                QueryFirstRequest request = (QueryFirstRequest)incoming;

                QueryDataSetCollection queryDataSets = null;
                byte[] continuationPoint = null;
                ParsingResultCollection parsingResults = null;
                DiagnosticInfoCollection diagnosticInfos = null;
                ContentFilterResult filterResult = null;

                response = new QueryFirstResponse();

                response.ResponseHeader = ServerInstance.QueryFirst(
                   request.RequestHeader,
                   request.View,
                   request.NodeTypes,
                   request.Filter,
                   request.MaxDataSetsToReturn,
                   request.MaxReferencesToReturn,
                   out queryDataSets,
                   out continuationPoint,
                   out parsingResults,
                   out diagnosticInfos,
                   out filterResult);

                response.QueryDataSets     = queryDataSets;
                response.ContinuationPoint = continuationPoint;
                response.ParsingResults    = parsingResults;
                response.DiagnosticInfos   = diagnosticInfos;
                response.FilterResult      = filterResult;
            }
            finally
            {
                OnResponseSent(response);
            }

            return response;
        }