// For complete examples and data files, please go to https://github.com/groupdocsconversion/GroupDocs_Conversion_NET
// Instantiating the conversion handler from custom common class
ConversionHandler conversionHandler = Common.getConversionHandler();
SaveOptions saveOptions = new PdfSaveOptions
{
ConvertPages = new List<int> { 1, 3, 5}
};
// Returns the converted Pdf as IO Stream.
var convertedDocumentStream = conversionHandler.Convert(Common.inputGUIDFile, loadOptions, saveOptions);
MemoryStream targetStream = new MemoryStream();
convertedDocumentStream.Save(targetStream);