Expanding the Results View will enumerate the Enumerable

I am trying to write a LINQ statement using Entity Framework. I am getting an error stating "Expanding the Results View will enumerate the Enumerable" My query is as follows :

 IQueryable lis = (from que in _repo.Query<Question>()
                   where que.PresentationImageId == 1 join map in
                   _repo.Query<UserChildCourseQuestionMap>() on que.Id equals map.QuestionId into t
                   from rt in t.DefaultIfEmpty()
                   group t by que.Id
                   into g
                   select new
                   {
                      Id = g.Key,
                      QuestionBody = (from q in _repo.Query<Question>() where q.Id == g.Key select q.QuestionBody),
                      value = (from p in _repo.Query<UserChildCourseQuestionMap>()
                      where p.QuestionId == g.Key

                      select new
                      {
                        Name = gg.Key.AnswerOption,
                        Count = gg.Count(),
                       }).Union(from p in _repo.Query<UserChildCourseQuestionMap>()
                         where p.QuestionId == g.Key && p.UserInputText != null
                         group p by p.UserInputText   into gg
                         select new
                         {
                            Name = gg.Key,
                            Count = gg.Count(),
                         }).Where(x => x.Name != null)

                    }
                   );

In LINQPad its working fine but in Visual Studio its not. Following is the image result which i am getting in LINQPad :

Please let me know where am I going wrong?

Following is the Screen Shot which i am getting when i expand the resultset: Expand Image