static void Main() { Console.OutputEncoding = Encoding.Unicode; List <Student> studentsListFirst = new List <Student> { new Student(2018, "Alex", 18, 92), new Student(2018, "Boris", 18, 85), new Student(2018, "Jack", 19, 75), new Student(2018, "Amelia", 18, 58), new Student(2018, "Lily", 19, 60) }; Teacher firstTeacher = new Teacher("History", new DateTime(2011, 5, 1), 3500, "Gerald Hall", 35, 87); TrainingClass trainingClassFirst = new TrainingClass(studentsListFirst, firstTeacher, "History A51"); PrintClassInformation(trainingClassFirst); #region Change entities for test studentsListFirst[0].SetWright(91); studentsListFirst[1].SetName("Oscar"); //Boris change name studentsListFirst[1].SetWright(89); //Boris put on weight studentsListFirst[3].SetWright(59); foreach (Student student in studentsListFirst) { student.AddOneYearAge(); student.IncreaseYearOfStudy(); } firstTeacher.ChangeAcademicSubject("History and history of the English language"); firstTeacher.AddSalary(500); firstTeacher.AddOneYearAge(); #endregion Console.WriteLine("\nShow new information for test:\n"); PrintClassInformation(trainingClassFirst); Console.ReadLine(); }