renestein

 // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
          loadPersistentState();
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)

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public interface IInitialize
{
  void Init();
  SynchronizationContext SynchContext
  {
    get;
    set;
  }
   
}

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 public interface ITransientStateManager
 {
    object SaveState();
    void LoadState(object obj);
 }

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public interface IActivated
{
    void Activate();
}

 public interface IDeactivated
 {
    void Deactivate();
 }

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public class PropertyNotificationBase : INotifyPropertyChanged
  {
    public event PropertyChangedEventHandler PropertyChanged = delegate{};
    
    public PropertyNotificationBase()
    {
      SuppressPropertyChangedNotification = false;
    }

    public SynchronizationContext SynchContext

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        public virtual string UserName
        {
          get
          {
            return m_userName;
          }

          set
          {

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  public abstract class ViewModelBase : PropertyNotificationBase, ITransientStateManager, IInitialize, IActivated, IDeactivated
  {
        
      public ViewModelBase()
      {
                                
      }

      static ViewModelBase()
      {

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public ViewModelBase(string pageTitle) : this()
{
  PageTitle = pageTitle;
}

public string PageTitle
{
  get;
  set;
}

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public bool CanUseModel
{
  get
    {
      return !IsInvalidModel && IsAllInitDataLoaded();
    }
}

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 public void Init()
      {
        try
        {
          IsInvalidModel = true;
          AppTitle = GlobalConstants.APP_MAIN_TITLE;
          SuppressValidating = false;
          IsInvalidModel = false;
          DoInternalInit();
          ThreadPool.QueueUserWorkItem(_ =>