// Methods to implement commands to move and remove students.
public void MoveStudentToTop(Student student)
{
Students.Move(Students.IndexOf(student), 0);
}
public void RemoveStudent(Student student)
{
Students.Remove(student);
}
public void MoveStudentToBottom(Student student)
{
Students.Move(Students.IndexOf(student), Students.Count - 1);
}