ASP.NET 泛型类型 Dictionary操作

protected void Page_Load(object sender, EventArgs e)
    {
        //泛型Dictionary  
        Dictionary<string, string> dit = new Dictionary<string, string>();
        dit.Add("13", "张三");
        dit.Add("22", "李四");
        Response.Write("总数" + dit.Count + "<br/>");//字典数据总数  
        dit.Remove("13");//删除一个键  
        if (!dit.ContainsKey("13"))
        {
            dit.Add("13", "张三1");
        }//判读如果不包含指定的键则添加  
        foreach (KeyValuePair<string, string> kvp in dit)
        {
            Response.Write(kvp.Key);
            Response.Write("=====" + kvp.Value);
            Response.Write("<br/>");
        }//循环字典中数据  

        Dictionary<string, string>.KeyCollection ditkey = dit.Keys;
        foreach (string k in ditkey)
        {
            Response.Write(k + "<br/>");
        }//循环字典数据的键  

        Dictionary<string, string>.ValueCollection ditvalue = dit.Values;
        foreach (var v in ditvalue)
        {
            Response.Write(v + "<br/>");
        }//循环字典数据里的值  

        foreach (var ditk in dit.Keys)
        {
            Response.Write(ditk + "<br/>");
        }//另一种获取字典键的方法  

        string f = dit["13"];
        Response.Write(f);//根据键 获取值  

        string s = string.Empty;
        if (dit.TryGetValue("13", out s))
        {
            Response.Write("<br/>找到");
        }
        else
        {
            Response.Write("<br/>未找到");
        }//查找键是否存在  

        //泛型List 类型  
        List<string> a = new List<string>();
        a.Add("aa");
        a.Add("bb");
        foreach (string b in a)
        {
            Response.Write("<br/>" + b + "<br/>");
        }
        //泛型IList  
        IList<string> Il = new List<string>();
        Il.Add("11");
        Il.Add("22");
        foreach (var i in Il)
        {
            Response.Write(i + "<br/>");
        }
    }