数组集合

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
//int[] arr1 = new int[2] {1,2};
//int[,] arr2 = new int[2, 3] {
// {0,1,2 },
// {2,3,4 }a
// };

//Console.WriteLine(arr2[1,1]);

//ArrayList
//ArrayList alt = new ArrayList();
//alt.Add("123");
//alt.Add(123);
//alt.Add(true);
//bool iscontain = alt.Contains("1");
//alt.Clear();
/*alt.Insert(0, "abc")*/;
//Console.WriteLine(iscontain);

//for(int i = 0; i < alt.Count; i++)
//{
// Console.WriteLine(alt[i].ToString() + " " + alt[i].GetType().ToString());
//}

//foreach (var x in alt)
//{
// Console.WriteLine(x.ToString() + " " + x.GetType().ToString());
//}

//泛型集合 List
//List<string> str_list = new List<string>();
//str_list.Add("a");
//str_list.Add("b");
//str_list.Add("c");
//str_list.Add("d");

//foreach(string x in str_list)
//{
// Console.WriteLine(x);
//}

//哈希表hashtable

//Hashtable ht = new Hashtable();
//ht.Add("1","a");
//ht.Add(2, "b");
//ht.Add(3, false);
//ht.Add("x", 3.14);
//Console.WriteLine(ht[2]);
//foreach(var x in ht.Keys)
//{
// Console.WriteLine(ht[x]);
//}

//字典表 Dictionary

//Dictionary<string, int> dic = new Dictionary<string, int>();
//dic.Add("a", 3);
//dic.Add("b", 4);
//dic.Add("c", 5);
//dic.Add("d", 6);
//dic.Add("e", 7);

//foreach(var x in dic.Keys)
//{
// Console.WriteLine(x);
//}

//队列 queue

//Queue que = new Queue();
//que.Enqueue("张三");
//que.Enqueue("李四");
//que.Enqueue("王五");
//que.Enqueue("赵六");
//Console.WriteLine("现在的长度是" + que.Count);
//Console.WriteLine(que.Dequeue());
//Console.WriteLine("现在的长度是" + que.Count);

//堆栈 stack

Stack st = new Stack();
st.Push("a");
st.Push("b");
st.Push("c");
st.Push("d");

Console.WriteLine(st.Count);
Console.WriteLine(st.Pop());
Console.WriteLine(st.Count);

Console.ReadLine();

}
}

}