static void Main(string[] args)
{
Console.WriteLine("IPhone interface:");
Phone small = new Phone(new Small());
Phone big = new Phone(new Big());
small.Start();
big.Start();
Console.WriteLine();
Console.WriteLine("Demonstration of IComp interface:");
Kon ch = new Kon(new Cheap());
Kon ex = new Kon(new Exp());
ch.Start();
ex.Start();
Console.ReadKey();
}
