Serializing PlayerPrefs

Hi guys

I saw this script here (http://forum.unity3d.com/threads/c-serialization-playerprefs-mystery.72156/) and even though it is old, I was wondering whether it could still work in your opinion:

 using UnityEngine;
 using System;
 using System.IO;
 using System.Runtime.Serialization;
 using System.Runtime.Serialization.Formatters.Binary;
  
 public class PlayerPrefsSerializer
 {
     public static BinaryFormatter bf = new BinaryFormatter ();
        // serializableObject is any struct or class marked with [Serializable]
     public static void Save (string prefKey, object serializableObject)
     {
         MemoryStream memoryStream = new MemoryStream ();
         bf.Serialize (memoryStream, serializableObject);
         string tmp = System.Convert.ToBase64String (memoryStream.ToArray ());
         PlayerPrefs.SetString ( prefKey, tmp);
     }
    
     public static object Load (string prefKey)
     {
         string tmp = PlayerPrefs.GetString (prefKey, string.Empty);
         if (tmp == string.Empty )
             return null;
         MemoryStream memoryStream = new MemoryStream (System.Convert.FromBase64String (tmp));
         return bf.Deserialize (memoryStream);
     }
 }

The reason I ask is that I am trying to serialize my PlayerPrefs, but when I use this, I see no difference in how the strings look in Registry. Any help would be welcome!

Alternatively, how do you guys serialize your PlayerPrefs if at all?

Cheers! :-)