Thanks Suba, it helped.
>Hi,
Thank you for choosing Syncfusion product.
If your intention is to change the orientation of an existing PDF document, it can be achieved by importing existing document pages into new document and we can change the Orientation for a single page by using the class Orientation.
Kindly look into the sample code snippet,
PdfLoadedDocument ldoc = new PdfLoadedDocument(@"..\..\Data\pdf.pdf");
// Create a new document class object.
PdfDocument doc = new PdfDocument();
doc.ImportPageRange(ldoc, 0, ldoc.Pages.Count - 1);
//lets only rotate the 1st page
PdfPage page = doc.Pages[0];
page.Section.PageSettings.Orientation = PdfPageOrientation.Portrait;
doc.Save("Sample.pdf");
Please do find the sample from the below specified location and let me know if this helps,
http://www.syncfusion.com/support/user/uploads/Pdf_Window_77594_ee50fb5e.zipRegards,
Suba