无法反序列化此xml的所有元素

此XML的少数元素不进行反序列化，但也不会引发任何错误。

<?xml version="1.0" encoding="utf-8"?>
<TrialMWordsRecord xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <MyList>
    <MWords>
      <Id>0</Id>
      <Name>ListMWords1</Name>
      <Type>LIST</Type>
      <MyOutput>true</MyOutput>
      <WordsElements>
        <Words>
          <Name>ListMWords1</Name>
          <Value>Apple</Value>
          <Type>STRING</Type>
        </Words>
        <Words>
          <Name>ListMWords1</Name>
          <Value>Mango</Value>
          <Type>STRING</Type>
        </Words>
        <Words>
          <Name>ListMWords1</Name>
          <Value>Chickoo</Value>
          <Type>STRING</Type>
        </Words>
      </WordsElements>
    </MWords>
    <MWords>
      <Id>1</Id>
      <Type>RANDOM</Type>
      <MyOutput>true</MyOutput>
      <WordsElements>
        <Name>Limit</Name>
        <Value>3,8</Value>
        <Type>NUMERIC</Type>
      </WordsElements>
    </MWords>
  </TrialMWordsList>
</MyListRecord>

以下是我的课程：

[Serializable()]
[XmlRootAttribute("MyListRecord")]
public class MyList
{
    [XmlArray("MyList")]
    public List<MWords> MWords
    {
        get;
        set;
    }
    public static MyList Deserialize()
    {
        XmlSerializer deserializer = new XmlSerializer(typeof(MyList));
        TextReader textReader = new StreamReader(Application.StartupPath + "''MyList.xml");
        MyList resultList = (MyList)deserializer.Deserialize(textReader);
        textReader.Close();
        return resultList;
    }       
}
[Serializable()]
public class MWords
{
    public int Id
    {
        get;
        set;
    }
    public MWordsType Type
    {
        get;
        set;
    }
    public bool MyOutput
    {
        get;
        set;
    }
    public string Requirement
    {
        get;
        set;
    }
    [XmlArrayItem("WordsElements")]
    public List<Words> WordList
    {
        get;
        set;
    }
    public static MWords Deserialize()
    {
        XmlSerializer deserializer = new XmlSerializer(typeof(MWords));
        TextReader textReader = new StreamReader(Application.StartupPath + "''MWords.xml");
        MWords mwords = (MWords)deserializer.Deserialize(textReader);
        textReader.Close();
        return mwords;
    }
}
public class Words
{
    public string Value
    {
        get;
        set;
    }
    public TYPE Type
    {
        get;
        set;
    }
    public string Name
    {
        get;
        set;
    }
}

现在，当我反序列化此XML时，如果Type是LiST，则WordList会更新，例如，此处WordList的计数将为3，但如果Type是RANDOM则WordList为0，实际上应该是1而不是0。真的不知道是什么原因。