public void Leave(Student studentToLeave)
{
if (this.students.Count==0)
{
throw new Exception("No students added.");
}
this.students.Remove(studentToLeave);
}
public void Join(Student newStudent)
{
if (this.students.Count==30)
{
throw new IndexOutOfRangeException("Cannot add more than 30 students.");
}
this.students.Add(newStudent);
}
