C# List 泛型集合 与 字典集合

List 泛型集合

          //创建泛型集合对象
            List<int> list = new List<int>();
            //list.Add(1);
            //list.Add(2);
            //list.Add(3);

            list.AddRange(new int[] { 1, 2, 3, 4, 5, 6 });

            list.AddRange(new int[] { 1, 2, 3 });

            list.AddRange(list);

            //List泛型集合可以转换为数组
            int[] nums = list.ToArray();

            List<string> listStr = new List<string>();

            string[] str = listStr.ToArray();


            char[] chs = new char[] { 'c', 'b', 'a' };
            List<char> listChar = chs.ToList();
            for (int i = 0; i < listChar.Count; i++)
            {
                Console.WriteLine(listChar[i]);
            }

            List<int> listTwo = nums.ToList();


            for (int i = 0; i < list.Count; i++)
            {
                Console.WriteLine(list[i]);
            }
            Console.ReadKey();
        }

字典集合

            Dictionary<int, string> dic = new Dictionary<int, string>();
            dic.Add(1, "张三");
            dic.Add(2, "李四");
            dic.Add(3, "王五");
            dic[1] = "新来的";
            foreach (KeyValuePair<int,string> kv in dic)
            {
                Console.WriteLine("{0}---{1}",kv.Key,kv.Value);
            }

            foreach (var item in dic.Keys)
            {
                Console.WriteLine("{0}---{1}", item, dic[item]);
            }
            Console.ReadKey();