public MainPage()
        {
            InitializeComponent();
            Language = XmlLanguage.GetLanguage(CultureInfo.CurrentUICulture.Name);
            ApplicationBuilderClient client = WCFProxyFactory.CreateApplicationBuilderProxy();

            client.GetConfigurationStoreXmlCompleted += new EventHandler <GetConfigurationStoreXmlCompletedEventArgs>(client_GetConfigurationStoreXmlCompleted);
            client.GetConfigurationStoreXmlAsync();

            DataContextChanged += MainPage_DataContextChanged;

            if (ViewerApplicationControl.Instance != null && BuilderApplication.Instance != null)
            {
                ViewerApplicationControl.Instance.BuilderApplication = BuilderApplication.Instance;
            }
        }