how to create dictionary of list in c#

 public static void Main()
        {
            Dictionary<String, List<string>> dic = new Dictionary<string, List<string>>();

            List<string> li1 = new List<string>();
            li1.Add("text1"); li1.Add("text2"); li1.Add("text3"); li1.Add("text4");

            List<string> li2 = new List<string>();
            li2.Add("text1"); li2.Add("text2"); li2.Add("text3"); li2.Add("text4");

            dic["1"] = li1;
            dic["2"] = li2;


            foreach (string key in dic.Keys)
            {
                foreach (string val in dic[key])
                {
                    Console.WriteLine(val);
                }
            }
        }