我认为您将需要另一个类来保存这3个属性，并用 XmlAttribute 属性标记这些属性

I think you are going to need another class to hold the 3 properties, and mark those properties with the XmlAttribute attribute

[Serializable]
public class Name
{
    [XmlAttribute]
    public string PropertyName { get; set; }

     [XmlAttribute]
    public string DisplayName { get; set; }

     [XmlAttribute]
    public int ListOrder { get; set; }
}

[Serializable]
public class FullName
{
    private Name strFirstName;
    [XmlElement("FirstName")]
    public Name FirstName
    {
        get { return strFirstName; }
        set { strFirstName = value; }
    }

    private Name strMiddleName;
    [XmlElement("MiddleName")]
    public Name MiddleName
    {
        get { return strMiddleName; }
        set { strMiddleName = value; }
    }

    private Name strLastName;
    [XmlElement("LastName")]
    public Name LastName
    {
        get { return strLastName; }
        set { strLastName = value; }
    }

    [XmlElement("ListOrder")]
    public int ListOrder { get; set; }
}

[Serializable]
public class Visibility
{
    public FullName FullName { get; set; }

    [XmlAttribute("DisplayName")]
    public String DisplayName { get; set; }

}

[Serializable]
public class Visibilities
{
    [XmlAttribute("AppName")]
    public String AppName { get; set; }

    [XmlElement("Visibility")]
    public List<Visibility> Visibility { get; set; }
}

序列化:

<Visibilities>
  <Visibilities AppName="Test2">
    <Visibility DisplayName="Full Name">
      <FullName>
        <FirstName PropertyName="FullName.FirstName" DisplayName="First Name" ListOrder="3" />
        <MiddleName PropertyName="FullName.MiddleName" DisplayName="Middle Name" ListOrder="3" />
        <LastName PropertyName="FullName.LastName" DisplayName="Last Name" ListOrder="3" />
        <ListOrder>0</ListOrder>
      </FullName>
    </Visibility>
</Visibilities>