public GnuPGWrapper(string binDir)
 {
     this.binDir = (binDir == null ? default_binDir : binDir);
     GPGCommand  = new GnuPGCommand();
     GPGCommand.HomeDirectory = this.binDir;
 }
 public GnuPGWrapper()
 {
     this.binDir = default_binDir;
     GPGCommand  = new GnuPGCommand();
     GPGCommand.HomeDirectory = default_binDir;
 }