Mini XML serializer

using System;
using System.Collections.Generic;
using System.Text;

namespace MiniXMLSerializer.TestClasses
{
    class DataClass : IMiniSerializable
    {
        static int instId = 0;
        public string name = "";
        public double X = 0;
        static Random rnd = new Random();
        public DataList listPointer = null;

        public DataClass()
        {
            name = "inst " + (instId++);
            X = rnd.NextDouble() * 300;
        }

        public void OnSerialize(MiniSerializer serializer)
        {
            serializer.Serialize("name", this.name);
            serializer.Serialize("X", X);
            serializer.Serialize("listPointer", listPointer);
        }

        public void OnDeserialize(MiniSerializer serializer)
        {
            object obj = serializer.Deserialize("DoNotExists"); // 1st empty objects
            object obj2 = serializer.Deserialize("DoNotExists2"); // 2nd empty objects
            name = (string)serializer.Deserialize("name");
            X = (double)serializer.Deserialize("X");
            listPointer = (DataList)serializer.Deserialize("listPointer");
        }
    }
}