是否有可能以某种方式优化此 XML 解析？

两个用于记住解析的类：

class Answer
    {
        public int Index { get; set; }
        public bool Correct { get; set; }
        public string Desc { get; set; }
    }

    class Question
    {
        public int Id { get; set; }
        public string Content { get; set; }
        public string MainQuestion { get; set; }
        public int MainQuestionContent { get; set; }
        public List<Answer> Answers { get; set; } = new List<Answer>();
    }

接下来，XML 本身及其解析：

static void Main(string[] args)
    {
        string xml = @"<?xml version=""1.0"" encoding=""utf-8"" ?>
                 <testing>
                  <questions>
                    <question id=""1"" content=""hi"">
                      <main_question content=""1"">Вопрос 1</main_question>
                      <answer index=""1"" correct=""true"">Ответ 1</answer>
                      <answer index=""2"" correct=""true"">Ответ 2</answer>
                      <answer index=""3"" correct=""false"">Ответ 3</answer>
                    </question>
                  </questions>
                </testing>";

        XElement elements = XElement.Parse(xml);

        List<Question> questionsList = new List<Question>();
        Question itemQuestion;
        Answer itemAnswer;

        foreach (XElement question in elements.Element("questions").Elements("question"))
        {
            itemQuestion = new Question();

            itemQuestion.Id = Convert.ToInt32(question.Attribute("id")?.Value);
            itemQuestion.Content = question.Attribute("content")?.Value;
            itemQuestion.MainQuestion = question.Element("main_question")?.Value;
            itemQuestion.MainQuestionContent = Convert.ToInt32(question.Element("main_question")?.Attribute("content")?.Value);

            var answers = from a in question.Elements("answer")
                          select new
                          {
                              AttributeIndex = a.Attribute("index")?.Value,
                              AttributeCorrect = a.Attribute("correct")?.Value,
                              Answer = a?.Value
                          };

            if (answers.Any())
            {
                foreach (var item in answers)
                {
                    itemAnswer = new Answer();

                    itemAnswer.Index = Convert.ToInt32(item.AttributeIndex);
                    itemAnswer.Correct = Convert.ToBoolean(item.AttributeCorrect);
                    itemAnswer.Desc = item.Answer;

                    itemQuestion.Answers.Add(itemAnswer);
                }
            }

            questionsList.Add(itemQuestion);

        }
    }

我想把foreach (XElement question in elements.Element("questions").Elements("question")) 它变成 LINQ 查询，但我不知道该怎么做。

感谢@Grundy 的提示，原来是这样优化的：

List<Question> questionsList = (from question in elements.Element("questions").Elements("question")
                                        select new Question()
                                        {
                                            Id = Convert.ToInt32(question.Attribute("id")?.Value),
                                            Content = question.Attribute("content")?.Value,
                                            MainQuestion = question.Element("main_question")?.Value,
                                            MainQuestionContent = Convert.ToInt32(question.Element("main_question")?.Attribute("content")?.Value),
                                            Answers = (from a in question.Elements("answer")
                                                       select new Answer
                                                       {
                                                           Index = Convert.ToInt32(a.Attribute("index")?.Value),
                                                           Correct = Convert.ToBoolean(a.Attribute("correct")?.Value),
                                                           Desc = a?.Value

                                                       }).ToList()
                                        }).ToList();