c# 键值对集合Dictionary

  Dictionary<int,string> dc = new Dictionary<int ,string>();
            dc.Add(1, "天气好");
            dc.Add(2, "天气不好");
            dc[2] = "我修改你";
            dc[3] = "我是新加的"; //没有就添加，有则修改
            dc.ContainsValue(); //重要的两个方法
            dc.ContainsValue();
            //遍历,var简便些
            foreach (var keyValuePair in dc)
            {
                Console.WriteLine($"{keyValuePair.Key}:{keyValuePair.Value}");
            }
            //或者 声明类型 KeyValuePair<int,string> kv
            foreach (KeyValuePair<int,string> kv  in dc)
            {
                Console.WriteLine($"{kv.Key}:{kv.Value}");
            }
            Console.ReadKey();

int[] raw = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            List<int> ji = new List<int>();
            List<int> ou = new List<int>();
            for (int i = 0; i < raw.Length; i++)
            {
                if (raw[i]%2==0)
                {
                    ou.Add(raw[i]);
                }
                else 
                {
                    ji.Add(raw[i]);
                }
            }
            //拼接新字典键值对
            Dictionary<int, int> dc = new Dictionary<int, int>();
            for (int i = 0; i < ou.Count; i++)
            {
                dc.Add(ji[i], ou[i]);
            }

            foreach (var item in dc)
            {
                Console.WriteLine($"{item.Key}:{item.Value}");
            }