c##region #endregion折叠代码

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#region 折叠代码此处可以加注释
            /*
            //Hashtable ht = new Hashtable();
            Dictionary<string, string> ht = new Dictionary<string, string>();
            ht.Add("a", "a1");
            ht.Add("b", "b1");
            ht.Add("c", "c1");

            // 遍历HashTable
            //ArrayList akey = new ArrayList(ht.Keys);
            //foreach (string key in akey)
            foreach (string key in ht.Keys)
            {
                Console.WriteLine("{0},{1}", key, ht[key]);
            }

            //foreach (DictionaryEntry de in ht) {
            //    Console.WriteLine("{0},{1}", de.Key, de.Value);
            //}

            IDictionaryEnumerator en = ht.GetEnumerator();
            while (en.MoveNext()) {
                string strKey = en.Key.ToString();
                Console.WriteLine(strKey);
                string strValue = en.Value.ToString();
                Console.WriteLine(strValue);

            }

            foreach (var obj in ht) {
                Console.WriteLine("{0},{1}", obj.Key, obj.Value);
            }

            Console.ReadKey();
             */
            #endregion

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