Question

I am trying to make an appointment book in Silverlight with C#, so I will have a main AppointmentBook control, with follows to store each of the Appointment control:

    List<kAppointment> appointments = null;

    public IList<kAppointment> Appointments
    {
        get
        {
            if (appointments == null)
            {
                appointments = new List<kAppointment>();
            }

            // Can notify something change here, 
            return appointments;
        }
    }

I can notify the AppointmentBook control new list assigned with above code, so it will redraw each of the appointments control.

But how can I check it if the appointment list is changed by the follows?:

appointments.Add(NewAppointment);

Answer 1

Sounds like a job for ObservableCollection.

This lets us subscribe to events and tells us in what way the collection changed.