//Classroom public Classroom AddClassroom(string name) { if (string.IsNullOrWhiteSpace(name)) { throw new NullReferenceException(); } if (_listclassroom.ContainsKey(name)) { throw new ArgumentException(); } Classroom classroom = new Classroom(name, this); _listclassroom.Add(name, classroom); return classroom; }
public bool RemoveClassroom(Classroom c) { if (c == null) throw new ArgumentException(); string name = c.Name; if (_listpromotion.ContainsKey(name)) { _listpromotion.Remove(name); return true; } else { return false; } }