private void FillAllAppointments()
        {
            var allAppointments = AppointmentService.GetAllAppointments().Select(x => new CommandedAppointment(x)
            {
                RefreshAppointments = this.RefreshAppointments
            }).ToList();

            AllPatientsAppointments.Clear();
            AllPatientsAppointments.AddRange(allAppointments);
        }