/// <summary>
        /// Determines how best to support navigation back to the previous application state.
        /// </summary>
        public static void Activate(String queryText, ApplicationExecutionState previousExecutionState)
        {
            var previousContent = Window.Current.Content;
            var frame           = previousContent as Frame;

            if (frame != null)
            {
                // If the app is already running and uses top-level frame navigation we can just
                // navigate to the search results
                frame.Navigate(typeof(SearchResultsPage), queryText);
            }
            else
            {
                // Otherwise bypass navigation and provide the tools needed to emulate the back stack
                SearchResultsPage page = new SearchResultsPage();
                page._previousContent        = previousContent;
                page._previousExecutionState = previousExecutionState;
                page.LoadState(queryText, null);
                Window.Current.Content = page;
            }

            // Either way, active the window
            Window.Current.Activate();
        }
        /// <summary>
        /// Determines how best to support navigation back to the previous application state.
        /// </summary>
        public static void Activate(String queryText, ApplicationExecutionState previousExecutionState)
        {
            var previousContent = Window.Current.Content;
            var frame = previousContent as Frame;

            if (frame != null)
            {
                // If the app is already running and uses top-level frame navigation we can just
                // navigate to the search results
                frame.Navigate(typeof(SearchResultsPage), queryText);
            }
            else
            {
                // Otherwise bypass navigation and provide the tools needed to emulate the back stack
                SearchResultsPage page = new SearchResultsPage();
                page._previousContent = previousContent;
                page._previousExecutionState = previousExecutionState;
                page.LoadState(queryText, null);
                Window.Current.Content = page;
            }

            // Either way, active the window
            Window.Current.Activate();
        }