I am using the Aspose PDF library for .NET, version 10.7. I am trying to convert PDFs to grayscale and using the code posted at http://www.aspose.com/docs/display/pdfnet/Convert+a+PDF+from+RGB+colorspace+to+Grayscale
T…...Replace(Int32 , Stream , Int32 , Boolean...Aspose.Pdf.XImageCollection.Replace(Int32 , Stream , Int32 , Boolean...