Is it possible to do the enum without having to do a cast?
class Program { private enum Subject { History = 100, Math =200, Geography = 300 } static void Main(string[] args) { Console.WriteLine(addSubject((int) Subject.History)); //Is the int cast required. } private static int addSubject(int H) { return H + 200; } } I'll take a stab at part of what the business logic is supposed to be:
class Program { [Flags] // <-- private enum Subject { History = 1, Math = 2, Geography = 4 // <-- Powers of 2 } static void Main(string[] args) { Console.WriteLine(addSubject(Subject.History)); } private static Subject addSubject(Subject H) { return H | Subject.Math; } } 
[Flags] is removed, you don't get History, Math back as output, which is helpful when debugging.No, because then you would lose type safety (which is an issue with C++ enums).
It is beneficial that enumerated types are actual types and not just named integers. Trust me, having to cast once in a while is not a problem. In your case however I don't think you really want to use an enum at all. It looks like you are really after the values, so why not create a class with public constants?
BTW, this makes me cringe:
private static int addSubject(int H) { return H + 200; } 
