public void RemoveStudent(Student student, Student.Status newStatus)
 {
     foreach (Student element in students)
     {
         if (element == student)
         {
             ChangeStatus(student, newStatus);
             students.Remove(element);
             student.GroupName = "none";
             break;
         }
     }
 }
 public void ChangeStatus(Student student, Student.Status newStatus)
 {
     student.StudentStatus = newStatus;
 }
 public PersonFactory ClassStatus(Student.Status status)
 {
     _classStatus = status; return(this);
 }