C# XML 序列化列表，元素名称取决于类

我想序列化一个List<AbstractClass>其中包含DerivedClassA and DerivedClassB这两个类都派生自AbstractClass.

此外，我想向包装列表中每个元素的元素添加一个属性。我想要的输出是这样的：

<MyCustomListName foo="bar">
    <DerivedClassA baseAttribute="value" attributeFromA="value"/>
    <DerivedClassB baseAttribute="value" attributeFromB="value"/>
    ...
</MyCustomListName> 

到目前为止我所拥有的是这样的：

public class MyCustomListName
{
   [XmlAttribute]
   public string foo {get; set;}

   [XmlArray]        
   public List<AbstractClass> list { get; set; }

}

[XmlInclude(typeof(DerivedClassA))]
[XmlInclude(typeof(DerivedClassB))]
public abstract class AbstractClass
{
   [XmlAttribute]
   public string baseAttribute {get; set;}
}

public class DerivedClassA : AbstractClass
{
   [XmlAttribute]
   public string attributeFromA {get; set;}
}

public class DerivedClassB : AbstractClass
{
   [XmlAttribute]
   public string attributeFromB {get; set;}
}

使用它，我得到以下输出：

<MyCustomListName foo="bar">
  <list>
    <AbstractClass xsi:type="DerivedClassA" baseAttribute="value" attributeFromA="value"/>
    <AbstractClass xsi:type="DerivedClassB" baseAttribute="value" attributeFromB="value"/>
  </list>
</MyCustomListName>

因此，为了获得我想要的输出，不应该有嵌套<list>元素，而不是xsi:type属性，元素名称应该是DerivedClassA or DerivedClassB取决于类型。

为不同类型的项目提供不同的名称：

[XmlElement("derivedA", typeof(DerivedClassA))]
[XmlElement("derivedB", typeof(DerivedClassB))]
public List<AbstractClass> list { get; set; }