static void Main(string[] args)
{
Console.WriteLine("Press 1 for car and 2 for Train");
string choice = Console.ReadLine();
Factory factory = null;
switch(choice)
{
case "1" :
factory = new CarsFactory();
break;
case "2":
factory = new TrainFactory();
break;
default:
break;
}
if (factory == null) return;
var product = factory.Create();
product.TotalPassengers();
Console.ReadKey();
}