gistfile1.cs

var optionSet = new OptionSet
			        {
			            {"p|password=", "The password for each certificate", x => password = x},
			            {"f|format=", "The string format for certificate names", x => format = x}
			        };

var outputPath = optionSet.Parse(args).FirstOrDefault();

// Vessl e:\Export
// Vessl --password=foobar e:\Export
// Vessl --password=foobar --format=xml e:\Export
// Vessl -p foobar -f xml e:\Export