private static void IdSearchParameterPredicateProcessing(List <ISearchParameterBase> SearchParametersList, ResourceSearchExpressionTrees <ResCurrentType, ResIndexStringType, ResIndexTokenType, ResIndexUriType, ResIndexReferenceType, ResIndexQuantityType, ResIndexDateTimeType> Search, ExpressionStarter <ResCurrentType> MainPredicate) { var IdSearchParamerterList = SearchParametersList.Where(x => x.Resource == FHIRAllTypes.Resource.GetLiteral() && x.Name == "_id"); if (IdSearchParamerterList != null) { ExpressionStarter <ResCurrentType> NewIdPredicate = null; foreach (var IdSearchParameter in IdSearchParamerterList) { if (IdSearchParameter is SearchParameterToken SearchTypeToken) { NewIdPredicate = LinqKit.PredicateBuilder.New <ResCurrentType>(); foreach (var SearchValue in SearchTypeToken.ValueList) { if (!SearchTypeToken.Modifier.HasValue) { var Expression = Search.MainResourceFhirIdAny(SearchValue.Code); NewIdPredicate = NewIdPredicate.Or(Expression); } } } MainPredicate.Extend <ResCurrentType>(NewIdPredicate, PredicateOperator.And); } SearchParametersList.RemoveAll(x => x.Resource == FHIRAllTypes.Resource.GetLiteral() && x.Name == "_id"); } }