相关疑难解决方法(0)

我有3个实体:

Questionnaire.cs:

public class Questionnaire
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ICollection<Question> Questions { get; set; }
}

Question.cs:

public class Question
{
    public int Id { get; set; }
    public string Text { get; set; }
    public ICollection<Answer> Answers { get; set; }
}

并且Answer.cs:

public class Answer
{
    public int Id { get; set; }
    public string UserId { get; set; }
    public string …