Viscomsoft UWP PDF Viewer SDK

[C# Syntax] 
using Viscomsoft.UWP.PDFViewerSDK;

private async void open(StorageFile file)
  {

    DocumentFactory factory = new DocumentFactory();

    IDocument doc = factory.CreateDocument(file.Name);

    bool opened = await doc.OpenAsync(file);

    _pdfDisplayManager = new PDFDisplayManager();

    _pdfDisplayManager.LicenseKey="XXXXXX";

    _pdfDisplayManager.Width = (int)Window.Current.Bounds.Width;

    _pdfDisplayManager.Height = (int)Window.Current.Bounds.Height;

    _pdfDisplayManager.Document = doc;

    _pdfDisplayManager.TextSearch.TextFound += new EventHandler(TextSearch_TextFound);

    _pdfDisplayManager.GotoPage(1);

    uiViewPanel.Child = createScrollViewControl();

    int iPageCouunt = _pdfDisplayManager.PageCount;

  }

 async void TextSearch_TextFound(object sender, EventArgs e)
  {

    MessageDialog dlg = new MessageDialog(_pdfDisplayManager.HighlightRect.ToString());
    dlg.ShowAsync();
  }