Ignore property defined in interface when serializing using JSON.net

Question

I have an interface with a property like this:

public interface IFoo {
    // ...

    [JsonIgnore]
    string SecretProperty { get; }

    // ...
}
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Answer 1

You should add [DataContract] in front of the class name.

It changes the default from including all properties, to including only explicitly marked properties. After that, add '[DataMember]' in front of each property you want to include in the JSON output.