IsolatedStorageSettings on Xamarin.Android / MonoDroid

#if ANDROID
using System;
using System.Net;
using System.Windows;
using Android.App;
using Android.Content;

namespace System.IO.IsolatedStorage
{
    /// <summary>
    /// TODO na Androidu to umí serializovat pouze string hodnoty!! (příp. int převedené na string)
    /// </summary>
    public class IsolatedStorageSettings
    {
        static IsolatedStorageSettings appSettings = null;
        public static IsolatedStorageSettings ApplicationSettings
        {
            get
            {
                if (appSettings == null)
                    appSettings = new IsolatedStorageSettings();
                return appSettings;
            }
        }

        // Returns:
        //     The value associated with the specified key. If the specified key is not
        //     found, a get operation throws a System.Collections.Generic.KeyNotFoundException,
        //     and a set operation creates a new element that has the specified key.
        public object this[string key]
        {
            get
            {
                // Load
                var prefs = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
                return prefs.GetString(key, null);
            }
            set
            {
                Add(key, value);
            }
        }

        public void Add(string key, object value)
        {
            var prefs = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
            var prefEditor = prefs.Edit();
            prefEditor.PutString(key, Convert.ToString(value));
            prefEditor.Commit();
        }

        public bool Contains(string key)
        {
            var prefs = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
            return prefs.Contains(key);
        }

        public void Save()
        {
        }

    }
}
#endif