RenderCertainFolderIntoPDF.cs

// Setup GroupDocs.Viewer config
ViewerConfig viewerConfig = new ViewerConfig();
viewerConfig.StoragePath = @"Absolute_Storage_Path";
 
// Create image handler
ViewerImageHandler imageHandler = new ViewerImageHandler(viewerConfig);

//Archive name with extension
string guid = "sample.zip";

// Create pdf options with specified folder name
PdfFileOptions options = new PdfFileOptions();
options.ArchiveOptions.FolderName = "FolderName";
 
// Get pdf document
FileContainer fileContainer = imageHandler.GetPdfFile(guid, options);
  
// Access result PDF document using fileContainer.Stream property