static void Main(string[] args)
{
IItem banana = new Banana();
IItem apple = new Apple();
IItem pear = new Pear();
IOperation operation = new Eat();
Console.WriteLine(banana.AcceptOperation(operation));
Console.WriteLine(apple.AcceptOperation(operation));
Console.WriteLine(pear.AcceptOperation(operation));
operation = new Throw();
Console.WriteLine(banana.AcceptOperation(operation));
Console.WriteLine(apple.AcceptOperation(operation));
Console.WriteLine(pear.AcceptOperation(operation));
}
