Cache System in Silverlight 5 RIA Application - Part 2 - Data write

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text;

namespace PortableLibrary.Common
{
    [DataContract]
    public class BaseViewModel : INotifyPropertyChanged
    {
        #region PROPERTY CHANGED

        public event PropertyChangedEventHandler PropertyChanged;

        public void NotifyPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #endregion

        #region PROPERTY MANAGEMENT

        public Object LoadProperty(String propertyName)
        {
            PropertyInfo pi = this.GetType().GetProperty(propertyName);

            return pi.GetValue(this, null);
        }

        public void WriteProperty(String propertyName, Object propertyValue, Type propertyType)
        {
            PropertyInfo pi = this.GetType().GetProperty(propertyName);

            pi.SetValue(this, Convert.ChangeType(propertyValue, propertyType, null), null);
        }

        #endregion

        private Boolean waitingModel;

        public Boolean WaitingModel
        {
            get { return waitingModel; }
            set { waitingModel = value; NotifyPropertyChanged("WaitingModel"); }
        }
    }
}