调用itextsharp，txt里的中文不识别，

Question

 BaseFont bfSun = BaseFont.CreateFont(@"c:\Windows\fonts\simsun.ttc,1", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            Document document = null;
            PdfWriter writer = null;
            try
            {
                Font font = new Font(bfSun, 16);
                iTextSharp.text.Rectangle rectPageSize = new iTextSharp.text.Rectangle(PageSize.A4);                rectPageSize = rectPageSize.Rotate();                document = new Document(rectPageSize, 10, 10, 25, 25);                writer = PdfWriter.GetInstance(document, new FileStream(targetPath, FileMode.Create));                StreamReader reader = new StreamReader(path);                string content = reader.ReadToEnd();                reader.Close();                document.Open();                document.Add(new Paragraph(content, font));                document.Close();                writer.Close();            }
            catch { }这是我的代码，我已经添加了font（宋体）了，为什么转档后的pdf中中文字符成乱码，谁帮我看下 谢谢！！！