WCF数据协议中XmlArrayItem标签不起作用的问题

在数据协议中，有一个属性是字符串数组，

[System.Xml.Serialization.XmlArrayAttribute(Order = 19)]
[System.Xml.Serialization.XmlArrayItemAttribute("CardNumber", typeof(string), IsNullable = false)]
[DataMember]
public string[] Cards {get; set; }

我想把它序列化成下面的格式

<Cards>
    <CardNumber>123123</CardNumber>
</Cards>

但是转换之后变成了

<Cards>
    <string>123123</string>
</Cards>

解决方法是：

1.创建一个类代替数组

[CollectionDataContract(ItemName="CardNumber")]
public class CardsList : List<string> { }

2.用

[DataMember(Name="Cards")]
public CardsList Cards {get; set; };

替换

[DataMember]
public string[] Cards {get; set; }

注：转自https://stackoverflow.com/questions/37586165/serializing-data-using-xmlarrayitemattribute-not-working-well