在WCF Web服务中复制了用“新”替代的属性

Question

I have a problem with a Webservice I'm creating, the thing is, I have a class, name it ClassA with PropertyA, he na ClassB inheriting ClassA that overrides PropertyA using "new" like this:

[DataContract]
public class ClassA
{
    [DataMember]
    public string PropertyA { get; set; }
    [DataMember]
    public string PropertyB { get; set; }
}

[DataContract]
public class ClassB : ClassA
{
    [DataMember]
    public new int PropertyA { get; set; }
}

This should make ClassB "replace" the string PropertyA from ClassA for a int PropertyA in ClassB.

I expose ClassB in a service method like this:

public bool TellMeSomething(ClassB param) { .... whatever .... }

When I add the service reference in the client application, the classes imported show something like this:

public class ClassA
{
    public string PropertyA { get; set; }
    public string PropertyB { get; set; }
}

public class ClassB : ClassA
{
    public int PropertyA1 { get; set; }
}

As you can notice, ClassB has no "new int PropertyA" anymore, but a "int PropertyA1". I guess the serializer finds the ancestor has a PropertyA already and doesn't know how to handle the "new" keyword to hide the "string PropertyA", so it creates a new name for the PropertyA in the inherited class...

Is there any way to avoid this behavior? I would need that property to be called like it should...

Answer 1

You should use generics instead of identifier re-using:

[DataContract]
public class ClassA<T>
{
    [DataMember]
    public T PropertyA { get; set; }
    [DataMember]
    public int PropertyB { get; set; }
}

// No need to override PropertyA since T is int and ClassB
// inherits both PropertyA and PropertyB...
[DataContract]
public class ClassB : ClassA<int>
{
}