Failing example for interface type name handling

TypeHandlingBug.cs

class ContractResolver : DefaultContractResolver
{
	public readonly IDictionary<Type, JsonContract> Contracts = new Dictionary<Type, JsonContract>();
	
	public override JsonContract ResolveContract(Type type)
	{
		if (Contracts.ContainsKey(type))
			return Contracts[type];
		else
			return base.ResolveContract(type);
	}
}

interface IInterface { }
class Parent { }

class Class : Parent, IInterface
{
	public string String { get; set; }
}

void Main()
{
	var resolver = new ContractResolver();
	var sett = new JsonSerializerSettings
	{
		ContractResolver = resolver,
		Formatting = Newtonsoft.Json.Formatting.Indented
	};
	
	var obj = new { Prop = (IInterface)new Class { String = "Abc" } };
	
	JsonObjectContract contract = (JsonObjectContract)resolver.ResolveContract(obj.GetType());
	resolver.Contracts.Add(obj.GetType(), contract);
	contract.Properties[0].TypeNameHandling = TypeNameHandling.All;
	
	var json = JsonConvert.SerializeObject(obj, sett);
	Console.WriteLine(json);
	
	var deserialized = JsonConvert.DeserializeObject(json, obj.GetType(), sett);
}