System.Globalization.CultureInfo currentCulture = System.Threading.Thread.CurrentThread.CurrentCulture;
            System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-EN");
            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument document;
            using (Stream stream = File.OpenRead("popup_dedetizacao_ok.pdf"))
            {
                document = provider.Import(stream);
            }
            System.Threading.Thread.CurrentThread.CurrentCulture = currentCulture;
        

            System.Globalization.CultureInfo currentCulture = System.Threading.Thread.CurrentThread.CurrentCulture;
            System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-EN");
            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument document;
            using (Stream stream = File.OpenRead("popup_dedetizacao_ok.pdf"))
            {
                document = provider.Import(stream);
            }
            System.Threading.Thread.CurrentThread.CurrentCulture = currentCulture;

            RadForm form = new RadForm();
            RadPdfViewer radPdfViewer1 = new RadPdfViewer();
            form.Controls.Add(radPdfViewer1);
            radPdfViewer1.LoadElementTree();
            radPdfViewer1.Dock = System.Windows.Forms.DockStyle.Fill;
            radPdfViewer1.Document = document;
             
            form.ShowDialog();