private void Init()
{
SystemTime.SetClock(() => new DateTime(2021, 01, 01));
_course = new Course(".NET Core Programming", new DateTime(2021, 01, 18), 100);
_course.SetTeacher(new Teacher("Carlos", "Osoria", ".NET Framework Stack"));
_course.SetTeacherAssistant(new TeacherAssistant("Damian", "Jais", ".NET Framework Stack"));
RegisterStudents();
CreateClasses();
SystemTime.ResetClock();
}