how to set pagesize in special pages that i want to rotate just these pages!

I have a document开发者_JAVA技巧 in iTextSharp. I want to set the default 'pagesize' to 'A4', but here we have special pages that needed to be rotated (just these pages) using A4.Rotate().

document.setpagesize(A4.Rotate()) for the pages to be rotated.

I'm sorry for my bad english.

Here's an example. It creates a PDF file with 4 pages. Page 1,2 and 4 use A4 portrait mode while page 3 uses A4 landscape mode:

class Program
{
    static void Main(string[] args)
    {
        Document doc = new Document(PageSize.A4);
        using (var stream = new FileStream("test.pdf", FileMode.Create, FileAccess.Write, FileShare.None))
        {
            var writer = PdfWriter.GetInstance(doc, stream);
            doc.Open();

            doc.NewPage();
            doc.Add(new Paragraph("Page1 (portrait A4)"));

            doc.NewPage();
            doc.Add(new Paragraph("Page2 (portrait  A4)"));

            // Set page size before calling NewPage
            doc.SetPageSize(PageSize.A4.Rotate());
            doc.NewPage();
            doc.Add(new Paragraph("Page3 (landscape A4)"));
            // Revert to the original page size before adding new pages
            doc.SetPageSize(PageSize.A4);

            doc.NewPage();
            doc.Add(new Paragraph("Page4 (portrait A4)"));

            doc.Close();
        }
    }