/// <summary>
/// Removes Student from enrolled students dictionary and adds a seat.
/// </summary>
/// <param name="student">Student to be removed from enrolled students.</param>
public void WithdrawStudent(Student student)
{
enrolledStudents.Remove(student.GetUserName());
numSeats++;
}
/// <summary>
/// Adds Student to enrolled students dictionary and removes a seat.
/// </summary>
/// <param name="student">Student to be added to enrolled students.</param>
public void EnrollStudent(Student student)
{
enrolledStudents.Add(student.GetUserName(), student);
numSeats--;
}
