private void MergeQueryDefinitions(Query newQueryDefinition) { // if current query definition is the one created by index searcher - replace; otherwise - merge QueryDefinition = IsUsingDefaultQueryDefinition ? newQueryDefinition : QueryHelper.MergeQueries(QueryDefinition, newQueryDefinition, BooleanClause.Occur.MUST, BooleanClause.Occur.MUST); IsUsingDefaultQueryDefinition = false; }