public void Enter()
        {
            var builder = new DeserializerBuilder();

            _optInDeserializer = builder
                                 .WithTypeInspector(inspector => new DataContractTypeInspector(inspector)
            {
                DataMemberSerialization = DataMemberSerialization.OptIn,
                NamingConvention        = new UnderscoredNamingConvention()
            })
                                 .IgnoreUnmatchedProperties()
                                 .Build();
        }