static void Main(string[] args) { RandomList list1 = new RandomList(new List <string> { "1", "2", "3", "4", "5", "6", "71", "8", "9", "11" }); RandomList list2 = new RandomList(); list2.AddElement("1"); list2.AddElement("2"); list2.AddElement("3"); list2.AddElement("4"); Console.WriteLine(list1.RandomString()); Console.WriteLine(list2.RandomString()); }