ITextSharp insert text to an existing pdf (its not visible) (no text color? :S)

Question

I found this script here on this page (ITextSharp insert text to an existing pdf)

I try a lot, I can find the text "Hello" with CTRL+F, but it is not visible... anyone have an idea ?

You can see that I have tried very often to bring color black in somehow, unfortunately without success :\

Thanks for your help =)

Code:

        using (var reader = new PdfReader(@"E:\input.pdf"))
        {
            using (var fileStream = new FileStream(@"E:\Output.pdf", FileMode.Create, FileAccess.Write))
            {
                var document = new Document(reader.GetPageSizeWithRotation(1));
                var writer = PdfWriter.GetInstance(document, fileStream);

                document.Open();

                for (var i = 1; i <= reader.NumberOfPages; i++)
                {
                    document.NewPage();

                    var baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
                    var importedPage = writer.GetImportedPage(reader, i);

                    var contentByte = writer.DirectContent;
                    contentByte.SetColorFill(BaseColor.BLACK);
                    contentByte.BeginText();

                    contentByte.SetFontAndSize(baseFont, 12);
                    contentByte.SetColorFill(BaseColor.BLACK);
                    contentByte.SetColorStroke(BaseColor.BLACK);

                    

                    var multiLineString = "Hello,\r\nWorld!".Split('\n');

                    foreach (var line in multiLineString) {
                        if (i == 1)
                        {
                            Console.WriteLine(i);
                            contentByte.SetColorFill(BaseColor.BLACK);
                            contentByte.SetColorStroke(BaseColor.BLACK);
                            contentByte.ShowTextAligned(PdfContentByte.ALIGN_LEFT, line, 200, 200, 0);
                        }
                    }
                    contentByte.SetColorFill(BaseColor.BLACK);
                    contentByte.EndText();
                    contentByte.AddTemplate(importedPage, 0, 0);
                }

                document.Close();
                writer.Close();
            }
        }