无法反序列化xml数组以列出web api模型c#

[XmlRoot("Root")]
public class MyModel
{
    [XmlArray("Items")]
    [XmlArrayItem("Item")]
    public List<string> Items { get; set; }
}

string xmlData = "<Root><Items><Item>Item 1</Item><Item>Item 2</Item></Items></Root>";

XmlSerializer serializer = new XmlSerializer(typeof(MyModel));
using (StringReader reader = new StringReader(xmlData))
{
    MyModel model = (MyModel)serializer.Deserialize(reader);
}

[DataContract]
public class MyModel
{
    [XmlArray("Items")]
    [XmlArrayItem("Item")]
    [DataMember]
    public List<string> Items { get; set; }
}

string xmlData = "<Root><Items><Item>Item 1</Item><Item>Item 2</Item></Items></Root>";

DataContractSerializer serializer = new DataContractSerializer(typeof(MyModel));
using (StringReader reader = new StringReader(xmlData))
{
    MyModel model = (MyModel)serializer.ReadObject(reader);
}