public class Dog
        {
            
            public string Name { get; set; }
            public Dog(string name)
            {
                this.Name = name;
            }
            public void ConsoleName()
            {
                Console.WriteLine(this.Name);
            }
        }           
         　　//栈 先进后出
            Stack<Dog> s = new Stack<Dog>();
            s.Push(new Dog("A"));//Push插入对象
            s.Push(new Dog("B"));
            s.Peek().ConsoleName();//Peek返回顶部对象--B
            s.Pop().ConsoleName();//移除并返回顶部对象（返回对象是移除的对象）--B
            s.Peek().ConsoleName();//--A

            //对列 先进先出
            Queue<Dog> q = new Queue<Dog>();
            q.Enqueue(new Dog("A"));
            q.Enqueue(new Dog("B"));
            q.Peek().ConsoleName();//返回位于开始处的对象--A
            q.Dequeue().ConsoleName() ;//移除并返回开始的对象--A
            q.Peek().ConsoleName() ;//A已经移除，返回B