Couchbase.N1QL.QueryRequest.AddNamedParameter C# (CSharp) Method

        public IQueryRequest AddNamedParameter(string name, object value)
        {
            _parameters.Add(name, value);
            return this;
        }

        protected override Task<SelectedSnapshot> LoadAsync(string persistenceId, SnapshotSelectionCriteria criteria)
        {

            // Create a Query with dynamic parameters
            string N1QLQueryString = "select `" + _CBBucket.Name + "`.* from `" + _CBBucket.Name + "` where DocumentType = 'SnapshotEntry' AND PersistenceId = $PersistenceId ";

            IQueryRequest N1QLQueryRequest = new QueryRequest()
                    .AddNamedParameter("PersistenceId", persistenceId);

            string N1QLQueryOrderByClauseString = "ORDER BY SequenceNr DESC";
            
            if (criteria.MaxSequenceNr > 0 && criteria.MaxSequenceNr < long.MaxValue)
            {
                N1QLQueryString += "AND SequenceNr <= $limit ";
                N1QLQueryOrderByClauseString = "ORDER BY SequenceNr DESC,";
                N1QLQueryRequest.AddNamedParameter("limit",criteria.MaxSequenceNr);
            }

            if (criteria.MaxTimeStamp != DateTime.MinValue && criteria.MaxTimeStamp != DateTime.MaxValue)
            {
                N1QLQueryString += " AND Timestamp <= $timelimit ";
                N1QLQueryOrderByClauseString = "ORDER BY Timestamp DESC,";
                N1QLQueryRequest.AddNamedParameter("timelimit", criteria.MaxTimeStamp.Ticks.ToString());
            }

            N1QLQueryString += N1QLQueryOrderByClauseString.TrimEnd(',') + " LIMIT 1"; 

            N1QLQueryRequest.Statement(N1QLQueryString).AdHoc(false);

            return taskLoadAsync(N1QLQueryRequest);
                

        }