Newtonsoft JSON ShouldSerialize and inheritance

Question

I have a class like this:

public class Foo
{
    public int Bar { get; set;}
}

This class is used to be stored in a NoSQL database so I need to store the Bar value. However, I don't want to expose this value through my API. So I created a class that inherits from Foo that I will return from my API.

I created the method ShouldSerializeBar by following the documentation I found here.

public class Foo2 : Foo
{
    public bool ShouldSerializeBar()
    {
        return false;
    }
}

However, the method is not called. Is there a workaround for this or another way to achieve this?

Answer 1

public class Foo
{
    public int Bar { get; set;}

    public virtual bool ShouldSerializeBar()
    {
        return true;
    }
}

public class Foo2 : Foo
{
    public override bool ShouldSerializeBar()
    {
        return false;
    }
}