public enum TIFFColorMode : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable  

//Export each page of a map series to an individual TIFF file.

//Create TIFF format with appropriate settings
TIFFFormat TIFF = new TIFFFormat()
{
  OutputFileName = filePath,
  Resolution = 300,
  ColorMode = TIFFColorMode.TwentyFourBitTrueColor,
  HasGeoTiffTags = true,
  HasWorldFile = true,
  ImageCompression = TIFFImageCompression.LZW
};

//Set up map series export options
MapSeriesExportOptions MSExportOptions_TIFF = new MapSeriesExportOptions()
{
  ExportPages = ExportPages.All,  //All pages
  ExportFileOptions = ExportFileOptions.ExportMultipleNames,  //Export each page to an individual file using page name as a suffix.
  ShowSelectedSymbology = true  //Include selection symbology in the output
};

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