private static void Main(string[] args)
{
ConcreteAggregate list = new ConcreteAggregate();
list[0] = "张三";
list[1] = "李四";
list[2] = "王五";
list[3] = "赵六";
list[4] = "周七";
Iterator i = list.CreateIterator();
object item = i.First();
Console.WriteLine("First:" + item);
while (i.Current() != i.Last())
{
Console.WriteLine(i.Current());
i.Next();
}
Console.WriteLine("Last:" + i.Last());
Console.ReadLine();
}
