static void Main(string[] args) { maths m = new maths(); m.arrayProcessing(5); try { m.division(4, 0); } catch (DivideByZeroException e) { Console.WriteLine("Cannot divide by zero"); } Finance f = new Finance(); try { f.tax(2000, 12); } catch (NBSException e) { Console.WriteLine("Its ok"); } try { f.tax(2000, 13); } catch (NBSException e) { Console.WriteLine("Not allowed"); } Friend friend = new Friend(); friend.go(); friend.show(); Sentence s = new Sentence(); s.longestWord("Hello my friend how are you"); Console.ReadKey(); }