C#的6种常用集合类大比拼(1)

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
namespace ConsoleApplication1
...{
class Program
...{
static void Main(string[] args)
...{
ArrayList al = new ArrayList();
al.Add(100);//单个添加
foreach (int number in new int[6] ...{ 9, 3, 7, 2, 4, 8 })
...{
al.Add(number);//集体添加方法一
}
int[] number2 = new int[2] ...{ 11,12 };
al.AddRange(number2);//集体添加方法二
al.Remove(3);//移除值为3的
al.RemoveAt(3);//移除第3个
ArrayList al2 = new ArrayList(al.GetRange(1, 3));
//新ArrayList只取旧ArrayList一部份
Console.WriteLine("遍历方法一:");
foreach (int i in al)//不要强制转换
...{
Console.WriteLine(i);//遍历方法一
}
Console.WriteLine("遍历方法二:");
for (int i = 0; i != al2.Count; i++)//数组是length
...{
int number = (int)al2[i];//一定要强制转换
Console.WriteLine(number);//遍历方法二
}
}
}
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
namespace ConsoleApplication1
...{
class Program
...{
static void Main(string[] args)
...{
Stack sk = new Stack();
Stack sk2 = new Stack();
foreach (int i in new int[4] ...{ 1, 2, 3, 4 })
...{
sk.Push(i);//填充
sk2.Push(i);
}

foreach (int i in sk)
...{
Console.WriteLine(i);//遍历
}
sk.Pop();
Console.WriteLine("Pop");
foreach (int i in sk)
...{
Console.WriteLine(i);
}

sk2.Peek();//弹出最后一项不删除 
Console.WriteLine("Peek");
foreach (int i in sk2)
...{
Console.WriteLine(i);
}
while (sk2.Count != 0)
...{
int i = (int)sk2.Pop();//清空
sk2.Pop();//清空
}
Console.WriteLine("清空");
foreach (int i in sk2)
...{
Console.WriteLine(i);
}
}
}
}