static void Main(string[] args) { Sorter aSorter = new Sorter(); aSorter=displayMenu(aSorter); String typeOfObj = aSorter.GetType().ToString(); if (typeOfObj == "Sorter_k112119.Sorter") Console.WriteLine("Wrong Choice"); else { aSorter.performSort(); Console.WriteLine(aSorter.getComplexity()); } }