Asp.Net Hashtable 의 이해

//[1]Hashtable 개체
        Hashtable ht1 = new Hashtable();
        Hashtable ht2 = new Hashtable();

        //[2]할당
        ht1.Add("a", "aa");
        ht1.Add("b", "bb");
        ht1.Add("c", "cc");
        ht1.Add("d", "dd");
        ht1.Add("e", "ee");
        
        ht2.Add(0, "0");
        ht2.Add(1, "1");
        ht2.Add(2, "2");

        //[3]DictionaryEntry 를 사용
        foreach (DictionaryEntry de in ht1)
        {
            Response.Write(String.Format("key : {0}, value : {1}
", de.Key, de.Value));            
        }

        Response.Write("
");

        //[4]ICollection 를 사용 ; 값만
        ICollection ic = ht1.Values;

        foreach (string str in ic)
        {
            Response.Write(String.Format("values : {0}
", str));            
        }

        Response.Write("
");

        //[5]ICollection 를 사용 ; 키만
        ICollection ic2 = ht1.Keys;

        foreach (string str2 in ic2)
        {
            Response.Write(String.Format("keys : {0}
", str2));            
        }

        Response.Write("
");        

        //[6]인덱스        
        for (int i = 0; i < ht2.Count; i++)
        {
            Response.Write(String.Format("index : {0}, value: {1}", i.ToString(), ht2[i]));
            Response.Write("
");
        }

        Response.Write("
");

        //[7]IEnumerator 사용 ; 값만   
        IEnumerator ie1 = ht1.Values.GetEnumerator();        

        while (ie1.MoveNext())
        {
            Response.Write(String.Format("value : {0}
", ie1.Current.ToString()));            
        }

        Response.Write("
");

        //[8]IEnumerator 사용 ; 키만
        IEnumerator ie2 = ht1.Keys.GetEnumerator();

        while (ie2.MoveNext())
        {
            Response.Write(String.Format("key : {0}
", ie2.Current.ToString()));            
        }