iTextSharp.text.pdf.PdfReader.SetPageContent C# (CSharp) Метод

        public void SetPageContent(int pageNum, byte[] content) {
    	    SetPageContent(pageNum, content, PdfStream.DEFAULT_COMPRESSION);
        }

 /// <summary>
 /// Removes layers from a PDF document </summary>
 /// <param name="reader">	a PdfReader containing a PDF document </param>
 /// <param name="layers">	a sequence of names of OCG layers </param>
 /// <exception cref="IOException"> </exception>
 public virtual void RemoveLayers(PdfReader reader, params string[] layers)
 {
     int n = reader.NumberOfPages;
     for (int i = 1; i <= n; i++)
         reader.SetPageContent(i, reader.GetPageContent(i));
     ICollection<string> ocgs = new HashSet2<string>();
     for (int i = 0; i < layers.Length; i++)
     {
         ocgs.Add(layers[i]);
     }
     OCGParser parser = new OCGParser(ocgs);
     for (int i = 1; i <= n; i++)
     {
         PdfDictionary page = reader.GetPageN(i);
         Parse(parser, page);
         page.Remove(new PdfName("PieceInfo"));
         RemoveAnnots(page, ocgs);
         RemoveProperties(page, ocgs);
     }
     PdfDictionary root = reader.Catalog;
     PdfDictionary ocproperties = root.GetAsDict(PdfName.OCPROPERTIES);
     if (ocproperties != null) {
         RemoveOCGsFromArray(ocproperties, PdfName.OCGS, ocgs);
         PdfDictionary d = ocproperties.GetAsDict(PdfName.D);
         if (d != null) {
             RemoveOCGsFromArray(d, PdfName.ON, ocgs);
             RemoveOCGsFromArray(d, PdfName.OFF, ocgs);
             RemoveOCGsFromArray(d, PdfName.LOCKED, ocgs);
             RemoveOCGsFromArray(d, PdfName.RBGROUPS, ocgs);
             RemoveOCGsFromArray(d, PdfName.ORDER, ocgs);
             RemoveOCGsFromArray(d, PdfName.AS, ocgs);
         }
     }
     reader.RemoveUnusedObjects();
 }