Add new property during serialization, remove property during deserialization

Question

Let's say I got a class like this:

[Version(123)]
public class Test
{

}

How would I add a property "Version": 123 to the generated json ?

I've been playin with a custom ContractResolver but with no success..

protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        var properties = base.CreateProperties(type, memberSerialization);

        var attributes = type.GetCustomAttributes(false);

        VersionAttribute attribute = (VersionAttribute)attributes.FirstOrDefault(att => att is VersionAttribute);
        if (attribute != null)
        {
            JsonProperty versionProperty = new JsonProperty();
            versionProperty.ValueProvider = new ValueProvider(attribute);
            versionProperty.PropertyType = typeof(int);
            versionProperty.PropertyName = "Version";
            versionProperty.DefaultValue = 0;
            properties.Add(versionProperty);
        }

        return properties;
    }