How do I pass list of data contracts containing object type to native and Managed C++

In short , I need to convert the attached C# datacontract to native C++ code.
In the attached C# data contract , i have data types like "List<datacontacts>"  and "object" .
I would like to know how we can convert the above data contracts,list of data contracts ,object datatypes to native C++ datatypes like structures etc..

Please let me know your suggestions/ideas on this.

Appreciate your help.

Thanks,
Sudhakar

<pre lang="c#">
   [DataContract(Name = "TopicDetails")]
    [Serializable]
    public class TopicDetails
    {
        protected object baseObjectType;

        [DataMember]
        public object BaseObjectType
        {
            get
            {
                return baseObjectType;
            }
            set
            {
                baseObjectType = value;
            }
        }
       
        static public TopicDetails CreateTopic<T, mT>(IComparable<T> objectType, IComparable<mT> objectID)
        {
            var topicDetails = new TopicDetails();
            topicDetails.BaseObjectType = objectType;
            return topicDetails;
        }

    }

    [DataContract(Name = "SubscriptionTopic")]
    [KnownType(typeof(List<TopicDetails>))]
     [Serializable]
    public class SubscriptionTopic
    {       
        private object creator;

        [DataMember]
        public object DBHandle
        {
            get
            {
                return creator;
            }
            set
            {
                creator = value;
            }
        }        
        static public SubscriptionTopic CreateSubscriptions<T, mT, nT>(IList<TopicDetails> topic, IComparable<mT> target, IComparable<nT> handle)
        {
            var subscriptionTopic = new SubscriptionTopic();           
            subscriptionTopic.DBHandle = handle;
            return subscriptionTopic;
        }

    }

    [DataContract(Name = "SubscriptionData")]
    [KnownType(typeof(List<SubscriptionTopic>))]
    [Serializable]
    public class SubscriptionDataContracts : IExtensibleDataObject
    {
        private ExtensionDataObject extensionDataObjectValue;

        [DataMember]
        public List<SubscriptionTopic> TopicList
        {
            get;
            set;
        }        
        public ExtensionDataObject ExtensionData
        {
            get
            {
                return extensionDataObjectValue;
            }
            set
            {
                extensionDataObjectValue = value;
            }
        }
    }