static void Main(string[] args) { FourOperations fourOperations = new FourOperations(); fourOperations.Sum(5, 6); fourOperations.Sum(6, 9); }
static void Main(string[] args) { if (args is null) { throw new ArgumentNullException(nameof(args)); } FourOperations fourOperations = new FourOperations(); fourOperations.Sum(10, 2); }