public bool AskForUnpackPPKXLocation {get; set;}

{
  //Options are mutually exclusive.

  //Setting ApplicationOptions.DownloadOptions.AskForUnpackPPKXLocation = true
  //supersedes any value in ApplicationOptions.DownloadOptions.UnpackPPKXLocation
  //and will prompt the user on an unpack. The value of 
  //ApplicationOptions.DownloadOptions.UnpackPPKXLocation will be unaffected
  //and is ignored. This is the same behavior as on the Pro UI.
  ApplicationOptions.DownloadOptions.AskForUnpackPPKXLocation = true;//override location

  //The default location is typically <My Documents>\ArcGIS\Packages
  //Setting ApplicationOptions.DownloadOptions.UnpackPPKXLocation to any
  //location overrides ApplicationOptions.DownloadOptions.AskForUnpackPPKXLocation
  //and sets it to false. This is the same behavior as on the Pro UI.
  ApplicationOptions.DownloadOptions.UnpackPPKXLocation = @"D:\data\for_ppkx";

  //Or, if ApplicationOptions.DownloadOptions.UnpackPPKXLocation already
  //contains a valid path, set ApplicationOptions.DownloadOptions.AskForUnpackPPKXLocation
  //explicitly to false to use the UnpackPPKXLocation
  if (!string.IsNullOrEmpty(ApplicationOptions.DownloadOptions.UnpackPPKXLocation))
    ApplicationOptions.DownloadOptions.AskForUnpackPPKXLocation = false;
}