Singleton Serialization problem using SingletonSerializationHelper

[Serializable]
    public sealed class GenSetup : ISerializable
    {
        private static readonly  GenSetup GenSetupObj = new GenSetup ();

        public static GenSetup GetInstance
        {
            get
            {
                return GenSetupObj;
            }
        }
   
        public void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.SetType(typeof(SingletonSerializationHelper));
        }

     public void Serialize()
        {
            FileStream fs = new FileStream("DataFile.dat", FileMode.Create);
            try
            {
                // Construct a BinaryFormatter and use it  //to serialize the data to the stream.
                BinaryFormatter formatter = new BinaryFormatter();                
                formatter.Serialize(fs, GenSetup.GetInstance);                
            }
            catch (SerializationException e)
            {
                Console.WriteLine("Failed to serialize. Reason: " + e.Message);
                throw;
            }
            finally
            {
                fs.Close();
            }
        }

        public void DeSerialize()
        {
            FileStream fs = new FileStream("DataFile.dat", FileMode.Open);
            try
            {
                // Construct a BinaryFormatter and use it  //to serialize the data to the stream.
                BinaryFormatter formatter = new BinaryFormatter();                                
                GenSetup pGenSetup = (GenSetup)formatter.Deserialize(fs);
            }
            catch (SerializationException e)
            {
                Console.WriteLine("Failed to serialize. Reason: " + e.Message);
                throw;
            }
            finally
            {
                fs.Close();
            }
        }
     }

[Serializable]
    internal sealed class SingletonSerializationHelper : IObjectReference
    {
        // This object has no fields (although it could).

        // GetRealObject is called after this object is deserialized.
        public Object GetRealObject(StreamingContext context)
        {
            // When deserialiing this object, return a reference to 
            // the Singleton object instead.
            return GenSetup.GetInstance;
        }
    }

public void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("Sequencer", m_IsSequencer, typeof(bool));
            info.AddValue("Strength", m_bIsStrength, typeof(bool));
        }

        public GenSetup(SerializationInfo info, StreamingContext context)
        {
            m_IsSequencer = info.GetBoolean("Sequencer");
            m_bIsStrength = info.GetBoolean("Strength");
        }