switch (engine)
            {
                case PdfEngine.Chrome:
                    return new Chrome.PdfDocument(path);
                case PdfEngine.XPdf:                     
                        return new XPdf.PdfDocument(path);                   
                default:
                    throw new ArgumentOutOfRangeException("engine");
            }

  switch (engine)
            {
                case PdfEngine.Chrome:
                    return new Chrome.PdfDocument(path);

                case PdfEngine.XPdf:
                    try
                    {
                        return new XPdf.PdfDocument(path);
                    }
                    catch (System.TypeInitializationException exp)
                    {
                        return new Chrome.PdfDocument(path);
                    }

                default:
                    throw new ArgumentOutOfRangeException("engine");
            }

	// TODO: Make sure you point to a PDF on your system:
        //  var uc = new UserControl1(@"D:\Documents\intuit_word2010_01.pdf");
	// this.windowsFormsHost1.Child = uc;