Serialize only interface properties to JSON with Json.net

Question

With a simple class/interface like this

public interface IThing
{
    string Name { get; set; }
}

public class Thing : IThing
{
    public int Id { get; se         


        

Answer 1

An alternative to [JsonIgnore] are the [DataContract] and [DataMember] attributes. If you class is tagged with [DataContract] the serializer will only process properties tagged with the [DataMember] attribute (JsonIgnore is an "opt-out" model while DataContract is "op-in").

[DataContract]
public class Thing : IThing
{
    [DataMember]
    public int Id { get; set; }

    public string Name { get; set; }
}

The limitation of both approaches is that they must be implemented in the class, you cannot add them to the interface definition.