private void ClickAddStudent(int id, string lname, string fname, string sname, string faculty, string department, string gpa, string privilege)
{
AcademicalScholarship ascholarship = new AcademicalScholarship(gpa);
SocialScholarship sscholarship = new SocialScholarship(privilege);
Student student = new Student(id, lname, fname, sname, faculty, department, gpa, privilege, ascholarship, sscholarship);
student.AddStudent(student);
MessageBox.Show("Студент добавлен в систему");
}