C# (CSharp) ExamGrades примеры использования

Пример #1

        public void AddExamGrade(Grade examGrade)
        {
            Contract.Requires(examGrade != null, "examGrade");

            ExamGrades.Add(examGrade);
        }

Пример #2

 public void AddExamGrade(Grade examGrade)
 {
     ExamGrades.Add(examGrade);
 }