Question

var v1 = _questionRepository.GetQuery().Where(q =>
                    q.EvaluationGroupId == evaluationGroupId &&
                    ((q.TopicValue == questionTopic &&
                    q.Index > currentQuestionIndex) ||
                     (q.TopicValue > (questionTopic) &&
                     q.Index >= 0 && q.Id != currentQuestionIndex)))
                     .OrderBy(q => q.Index).OrderBy(a => a.TopicValue).FirstOrDefault();

   var v2 = _questionRepository.GetQuery().Where(q =>
                    q.EvaluationGroupId == evaluationGroupId &&
                    ((q.TopicValue == questionTopic &&
                    q.Index > currentQuestionIndex) ||
                     (q.TopicValue > (questionTopic) &&
                     q.Index >= 0 && q.Id != currentQuestionIndex)))
                     .OrderBy(q => q.Index).OrderBy(a => a.TopicValue).ToList().FirstOrDefault()

v1 != v2 ENTITIES DIFFERENT How is it possible? (Data in db the same)

repository operate with EF entities

Answer 1

problem was that it used OrderBy().OrderBy instead OrderBy().ThenBy(). So problem is there. if change source code to OrderBy().ThenBy() then all work correct.