static void Main(string[] args)
{
var rnd = new Random();
long carId, empId;
carId = empId = rnd.Next();
IdentifierFor <Employee> employeeIdentifier = (empId);
employeeIdentifier = (Guid.NewGuid());
var carIdentifier = new IdentifierFor <Car>(carId);
var carwash = new Carwash();
carwash.Hire(employeeIdentifier);
carwash.Assign(empId, carId);
carwash.Assign(carId, empId);
Console.WriteLine(employeeIdentifier);
Console.WriteLine((long)employeeIdentifier);
Console.WriteLine(carIdentifier);
Console.WriteLine((long)carIdentifier);
Console.WriteLine(employeeIdentifier.Equals(employeeIdentifier));
Console.WriteLine(employeeIdentifier.Equals(carIdentifier));
Console.WriteLine(employeeIdentifier == employeeIdentifier);
// Console.ReadLine();
}
