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I am using Entity Framework and having a problem with getting parent and child data to the browser. Here are my classes: public class Question { public int QuestionId { get; set; } public string Title { get; set; } public virtual ICollection<Answer> Answers { get; set; } } public class Answer { public int AnswerId { get; set; } public string Text { get; set; } public int QuestionId { get; set; } public virtual Question Question { get; set; } } I am using the following code to return the question and answer data: public IList<Question> GetQuestions(int subTopicId, int questionStatusId) { var questions = _questionsRepository.GetAll() .Where(a => a.SubTopicId == subTopicId && (questionStatusId == 99 || a.QuestionStatusId == questionStatusId)) .Include(a => a.Answers) .ToList(); return questions; } On the C# side this seems to work however I notice that the answer objects have references back to the question. When I use the WebAPI to get the data to the browser I get the following message: The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'. Self referencing loop detected for property 'question' with type 'Models.Core.Question'. Is this because the Question has Answers and the Answers have a reference back to Question? All the places I have looked suggest having a reference to the parent in the child so I am not sure what to do. Can someone give me some advice on this.

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