Getting error "Lambda expression used inside Include is not"

Question

Once I writting quary var testresult = await _unit.Context.Tbltest.Include(p => p.Tblquestion).   ThenInclude(post => post.Tblquestionoptions.Where(k => k.Id == id)).Where(t => t.Id == id).FirstOrDefaultAsync();   It  throw  exception  "Lambda expression used inside Include is not"    Full Code :   public  async Task > GetQuestionOptionByIdAsync( long  id)   {   TestQueryModel modeltest =  null ;   try    {   //var testresult = await _unit.Context.Tbltest.Include(blog => blog.Tblquestion)    //.ThenInclude(post => post.Tblquestionoptions).Where(t => t.Id == testId).FirstOrDefaultAsync();    //var testresult1 = await _unit.Context.Tblquestion.Include(post => post.Tblquestionoptions).    // Where(t => t.Id == id).FirstOrDefaultAsync();    var testresult = await _unit.Context.Tbltest.Include(p => p.Tblquestion).   ThenInclude(post => post.Tblquestionoptions.Where(k => k.Id == id)).Where(t => t.Id == id).FirstOrDefaultAsync();   if  (testresult !=  null )   {   modeltest =  new  TestQueryModel();   modeltest.UserId = CurrentUserInfo.CurrentUser;   modeltest.TestId = testresult.Id;   modeltest.GradeId = testresult.GradeId;   modeltest.SubjectId = testresult.SubjectId;   modeltest.TopicId = testresult.TopicId;   modeltest.Questions = testresult.Tblquestion.Select(q =>  new  TestQuestionQueryModel   {   Question = q.Name,   QuestionId = q.Id,   Options = q.Tblquestionoptions.Select(t =>  new  TestQuestionOptionsQueryModel   {   OptionId = t.Id,   Option = t.Name,   IsSelect = t.IsMatched.HasValue ? t.IsMatched.Value :  false    }).ToList()   }).ToList();   return   new  ApiResult ( new  ApiResultCode(ApiResultType.Success), modeltest);   }   return   new  ApiResult ( new  ApiResultCode(ApiResultType.Error, messageText:  "no data found" ));   }   catch  (Exception ex)   {   ErrorTrace.Logger(LogArea.RepositoryLayer, ex);   return   new  ApiResult ( new  ApiResultCode(ApiResultType.Error, messageText:  "Error while geting data" ));   }   }

Madhav Sharma · Answer

Dear Salman , I have already checke these link bot unble to find solution

Salman Beg · Answer

Could you please check this link, https://www.gitmemory.com/issue/aspnet/EntityFrameworkCore/18248/540137593   https://github.com/dotnet/efcore/issues/18248   Thanks.