public static void Main()
{
var newPlayer = new Player(10, 10);
// Store internal state
var memory = new PositionMemory();
Console.WriteLine("\nSaving position:");
memory.Memento = newPlayer.SaveMemento();
Console.WriteLine(newPlayer.ToString());
// Continue changing originator
newPlayer.PosX = 1000;
newPlayer.PosY = 2000;
Console.WriteLine("\nChanging position of the player:");
Console.WriteLine(newPlayer.ToString());
// Restore saved state
Console.WriteLine("\nRestoring position:");
newPlayer.RestoreMemento(memory.Memento);
Console.WriteLine(newPlayer.ToString());
}