public ActionResult FixQuestions() { var fixedQuestions = new List <string>(); var removedQuestions = new List <string>(); foreach (var userQuestion in db.UserQuestions) { var slideTitle = userQuestion.SlideTitle; if (userQuestion.CourseId == null) { var cs = from c in courseManager.GetCourses() from s in c.Slides where s.Title == slideTitle select new { c, s }; var course_slide = cs.FirstOrDefault(); if (course_slide != null) { userQuestion.CourseId = course_slide.c.Id; userQuestion.SlideId = course_slide.s.Id; fixedQuestions.Add(userQuestion.SlideTitle); } else { db.UserQuestions.Remove(userQuestion); removedQuestions.Add(userQuestion.SlideTitle); } } } db.SaveChanges(); return(Content("Fixed:\n" + string.Join("\n", fixedQuestions) + "\n\n" + "Removed:\n" + string.Join("\n", removedQuestions))); }