private static void displayTeachers() { Console.WriteLine("Teachers:"); if (teachers == null) { teachers = client.GetTeachers(); } Dictionary <string, Teacher> teacherDictionary = client.GetTeachersIDDictionary(); for (int i = 0; i < teachers.Count; i++) { string name = teachers[i].FullName; string id = teachers[i].ID.ToString(); Console.WriteLine("{0} (id: {1})", teacherDictionary[id].FullName, id); } }