<?xml version="1.0" encoding="utf-8" ?>
<DMIFData>
  <Question ID="1">
    <tilte>电影碟中谍4的男主角是哪位？</tilte>
    <option>
      <answer id="A" >A.布鲁 斯威利斯</answer>
      <answer id="B">B.汤姆 克鲁斯</answer>
      <answer id="C">C.威尔 斯密斯</answer>
    </option>
    <rightanswers>B</rightanswers>
    <image>图片地址</image>
  </Question>
  <Question ID="2">
    <tilte>今年十一放几天假？</tilte>
    <option>
      <answer id="A" >A.10</answer>
      <answer id="B">B.9</answer>
      <answer id="C">C.8</answer>
    </option>
    <rightanswers>C</rightanswers>
    <image>图片地址</image>
  </Question>
</DMIFData>

XElement xEle = XElement.Load(@"C:\Documents and Settings\Administrator\桌面\Test.txt");
                var result = xEle.Descendants("Question").Select(a => new
                {
                    id = a.Attribute("ID").Value,
                    title = a.Element("tilte").Value,
                    rightanswer = a.Element("rightanswers").Value,
                    img = a.Element("image").Value,
                    options = a.Element("option").Descendants("answer").Select(b => new { 
                        option=b.Attribute("id").Value,
                        text=b.Value
                    })
                });

------解决方案--------------------
DataSet有自动推断功能：
C# code
        DataSet ds = new DataSet();
        ds.ReadXml(@"c:\test.xml");