private object CreateISerializable(JsonReader reader, JsonISerializableContract contract, string id)
    {
      Type objectType = contract.UnderlyingType;

      SerializationInfo serializationInfo = new SerializationInfo(contract.UnderlyingType, GetFormatterConverter());

      bool exit = false;
      do
      {
        switch (reader.TokenType)
        {
          case JsonToken.PropertyName:
            string memberName = reader.Value.ToString();
            if (!reader.Read())
              throw CreateSerializationException(reader, "Unexpected end when setting {0}'s value.".FormatWith(CultureInfo.InvariantCulture, memberName));

            serializationInfo.AddValue(memberName, JToken.ReadFrom(reader));
            break;
          case JsonToken.Comment:
            break;
          case JsonToken.EndObject:
            exit = true;
            break;
          default:
            throw CreateSerializationException(reader, "Unexpected token when deserializing object: " + reader.TokenType);
        }
      } while (!exit && reader.Read());

      if (contract.ISerializableCreator == null)
        throw CreateSerializationException(reader, "ISerializable type '{0}' does not have a valid constructor. To correctly implement ISerializable a constructor that takes SerializationInfo and StreamingContext parameters should be present.".FormatWith(CultureInfo.InvariantCulture, objectType));

      object createdObject = contract.ISerializableCreator(serializationInfo, Serializer.Context);

      if (id != null)
        Serializer.ReferenceResolver.AddReference(this, id, createdObject);

      // these are together because OnDeserializing takes an object but for an ISerializable the object is full created in the constructor
      contract.InvokeOnDeserializing(createdObject, Serializer.Context);
      contract.InvokeOnDeserialized(createdObject, Serializer.Context);

      return createdObject;
    }
 private void GenerateISerializableContract(Type type, JsonISerializableContract contract)
 {
   CurrentSchema.AllowAdditionalProperties = true;
 }
    private void SerializeISerializable(JsonWriter writer, ISerializable value, JsonISerializableContract contract, JsonProperty member, JsonContract collectionValueContract)
    {
      contract.InvokeOnSerializing(value, Serializer.Context);
      _serializeStack.Add(value);

      writer.WriteStartObject();

      if (ShouldWriteType(TypeNameHandling.Objects, contract, member, collectionValueContract))
      {
          WriteTypeProperty(writer, contract.UnderlyingType);
      }

      SerializationInfo serializationInfo = new SerializationInfo(contract.UnderlyingType, new FormatterConverter());
      value.GetObjectData(serializationInfo, Serializer.Context);

      foreach (SerializationEntry serializationEntry in serializationInfo)
      {
        writer.WritePropertyName(serializationEntry.Name);
        SerializeValue(writer, serializationEntry.Value, GetContractSafe(serializationEntry.Value), null, null);
      }

      writer.WriteEndObject();

      _serializeStack.RemoveAt(_serializeStack.Count - 1);
      contract.InvokeOnSerialized(value, Serializer.Context);
    }