C# Dictionary 终极使用方法

using System;   
using System.Collections.Generic;   
  
class DictionaryDemo   
{   
    static void Main(string[] args)   
    {   
        DictionaryDemo001();   
        Console.ReadLine();   
  
        DictionaryDemo002();   
        Console.ReadLine();   
  
        DictionaryDemo003();   
        Console.ReadLine();   
    }   
  
    /// <summary>   
    /// 一般用法   
    /// </summary>   
    static void DictionaryDemo001()   
    {   
        Dictionary<int, string> dict = new Dictionary<int, string>();   
        dict.Add(1, "111");   
        dict.Add(2, "222");   
  
        //判断是否存在相应的key并显示   
        if (dict.ContainsKey(2))   
        {   
            Console.WriteLine(dict[2]);   
        }   
  
        //遍历Keys   
        foreach (var item in dict.Keys)   
        {   
            Console.WriteLine("Key:{0}", item);   
        }   
  
        //遍历Values   
        foreach (var item in dict.Values)   
        {   
            Console.WriteLine("value:{0}", item);   
        }   
  
        //遍历整个字典   
        foreach (var item in dict)   
        {   
            Console.WriteLine("key:{0} value:{1}", item.Key, item.Value);   
        }   
    }   
  
    /// <summary>   
    /// 参数为其它类型   
    /// </summary>   
    static void DictionaryDemo002()   
    {   
        Dictionary<string, string[]> dict = new Dictionary<string, string[]>();   
        dict.Add("1", "1,11,111".Split(','));   
        dict.Add("2", "2,22,222".Split(','));   
        Console.WriteLine(dict["2"][2]);   
    }   
  
    /// <summary>   
    /// 调用自定义类   
    /// </summary>   
    static void DictionaryDemo003()   
    {   
        Dictionary<int, yongfa365> dict = new Dictionary<int, yongfa365>();   
        for (int i = 0; i < 10; i++)   
        {   
            yongfa365 y = new yongfa365();   
            y.UserCode = i;   
            y.UserName = "www.yongfa365.com " + i.ToString();   
            dict.Add(i, y);   
        }   
        foreach (var item in dict)   
        {   
            Console.WriteLine("{0} One:{1} UserName:{2}", item.Key, item.Value.UserCode, item.Value.UserName);   
        }   
    }   
}   
  
class yongfa365   
{   
    public int UserCode { get; set; }   
    public string UserName { get; set; }   
  
}