static void Main(string[] args) { var stations = new StationList(); var station1 = new RadioStation(89); stations.Add(station1); var station2 = new RadioStation(101); stations.Add(station2); var station3 = new RadioStation(102); stations.Add(station3); foreach (var x in stations) { Console.Write(x.GetFrequecy()); } var q = stations.Where(x => x.GetFrequecy() == 89).FirstOrDefault(); Console.WriteLine(q.GetFrequecy()); Console.ReadLine(); }