public enum ImageCompression : System.Enum, System.IComparable, System.IConvertible, System.IFormattable  

  //Export a layout to PDF

  //Create a PDF export format
  PDFFormat pdf = new PDFFormat()
  {
    OutputFileName = filePath,
    Resolution = 300,
    DoCompressVectorGraphics = true,
    DoEmbedFonts = true,
    HasGeoRefInfo = true,
    ImageCompression = ImageCompression.Adaptive,
    ImageQuality = ImageQuality.Best,
    LayersAndAttributes = LayersAndAttributes.LayersAndAttributes
};

  //Check to see if the path is valid and export
  if (pdf.ValidateOutputFilePath())
  {
    layout.Export(pdf);  //Export the PDF 
  }

//Export a single page layout to PDF.

//Create a PDF format with appropriate settings
//BMP, EMF, EPS, GIF, JPEG, PNG, SVG, TGA, and TFF formats are also available for export
PDFFormat PDF = new PDFFormat()
{
  OutputFileName = filePath,
  Resolution = 300,
  DoCompressVectorGraphics = true,
  DoEmbedFonts = true,
  HasGeoRefInfo = true,
  ImageCompression = ImageCompression.Adaptive,
  ImageQuality = ImageQuality.Best,
  LayersAndAttributes = LayersAndAttributes.LayersAndAttributes
};

//Check to see if the path is valid and export
if (PDF.ValidateOutputFilePath())
{
  await QueuedTask.Run(() => layout.Export(PDF));  //Export the layout to PDF on the worker thread
}

//Export a map series with multiple pages to a single PDF.

//Create PDF format with appropriate settings
PDFFormat MS_PDF = new PDFFormat()
{
  OutputFileName = filePath,
  Resolution = 300,
  DoCompressVectorGraphics = true,
  DoEmbedFonts = true,
  HasGeoRefInfo = true,
  ImageCompression = ImageCompression.Adaptive,
  ImageQuality = ImageQuality.Best,
  LayersAndAttributes = LayersAndAttributes.LayersAndAttributes
};

//Set up map series export options
MapSeriesExportOptions MS_ExportOptions = new MapSeriesExportOptions()
{
  ExportPages = ExportPages.Custom,  //Provide a specific list of pages
  CustomPages = "1-3, 5",  //Only used if ExportPages.Custom is set
  ExportFileOptions = ExportFileOptions.ExportAsSinglePDF,  //Export all pages to a single, multi-page PDF
  ShowSelectedSymbology = false  //Do no show selection symbology in the output
};

//Export on the worker thread
await QueuedTask.Run(() =>
{
  //Check to see if the path is valid and export
  if (MS_PDF.ValidateOutputFilePath())
  {
    layout.Export(MS_PDF, MS_ExportOptions);  //Export to PDF
  }
});