免费内容:

[free][quote]
程序代码：

using System;
using System.Collections;
namespace ConsoleApplication11
{
    class Program
    {
        static void Main(string[] args)
        {
            var array = new ArrayList();
            array.Add(2);
            array.Add(2);
            array.Add(1);
            array.Add(2);
            array.Add(3);
            array.Add(1);
            array.Add(2);
            array.Add(3);
            array.Add(5);
            array.Add(6);
            array.Add(4);
            array.Add(6);
            array.Add(9);
            array.Add(5);
            
            var hastable = new Hashtable();
            for (var i = 0; i < array.Count; i++)
            {
                try
                {
                    hastable.Add(array[i], null);
                }
                catch
                {
                    
                }
            }
            foreach(var x in hastable.Keys)
            {
                Console.WriteLine(x);
            }
            Console.ReadLine();
        }
    }
}