How to rotate and add border around the layout of image.

//Load the pdf document
 PdfLoadedDocument ldoc = new PdfLoadedDocument(path);
 
 var page = ldoc.Pages[0];
 PdfGraphics grapchics = page.Graphics;
 //Save the graphics state before rotating
 grapchics.Save();
 grapchics.RotateTransform(-20);
 //string imagePath = Server.MapPath("~/App_Data/logo.png");
 PdfBitmap image = new PdfBitmap(imagePath);
 grapchics.DrawImage(image, new PointF(50, 450));
 //Draws border within the bounds of an image
 grapchics.DrawRectangle(PdfPens.Black, new RectangleF(50, 450, image.Width,   image.Height));
 //Restore the graphics state once rotated.
 grapchics.Restore();
 //Save the document and dispose it.
 ldoc.Save("Output.pdf");
 ldoc.Close(true);