c# – 如何在WCF中访问继承的对象属性？

[ServiceContract]
public interface IInfo
{
    [DataMember]
    int Id{get;set;}
}

[DataContract]
[KnownType(typeof(Legal))]
public class Info
{
    [DataMember]
    public int Id { get; set; }
}

[DataContract]
public class Legal : Info
{
    [DataMember]
    public string ManagerName { get; set; }
}

[ServiceContract]
[ServiceKnownType(typeof(Legal))]
public interface IMyService
{
    [OperationContract]
    int DoWork(Info dto);
}

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class MyService : IMyService
{

    public int DoWork(Info dto)
    {
        string name;
        if (dto is Legal)
            name = (dto as Legal).ManagerName;
        return dto.Id;
    }
}

是否可以将dto视为Legal类型并且可以访问子属性？

我想存储dto,我不想为每个信息子项提供很多服务.

将泛型传递给服务不起作用,wsdl错误,
作为输入参数的IInfo等接口不起作用,铸造错误,
像Info这样的基类不起作用,子道具无法访问,
堆栈溢出不起作用,这是我第二次发布此问题,但没有答案！