static void Main() { Debug.Assert(PerformAction(), "Could not perform action"); StudentGradesCalculator calc = new StudentGradesCalculator(new int[] { 6, 5, 5, 4, 6, 6, 5, 6 }); Console.WriteLine(calc.GetAverageStudentGrade()); calc = new StudentGradesCalculator(new int[] { }); Console.WriteLine(calc.GetAverageStudentGrade()); }