private void LoadAppointments()
        {
            var appointmentDataHelper = new AppointmentDataHelper(EHealthCareDesktopApp.Properties.Settings.Default.UniqueIdentifier.ToString(),
                                                                  EHealthCareDesktopApp.Properties.Settings.Default.PatientID);

            listViewAppointments.ItemsSource = appointmentDataHelper.GetViewModel();
        }
        private void LoadAppointments()
        {
            var appointmentDataHelper = new AppointmentDataHelper(EHealthCareDesktopApp.Properties.Settings.Default.UniqueIdentifier.ToString(),
                 EHealthCareDesktopApp.Properties.Settings.Default.PatientID);

            listViewAppointments.ItemsSource = appointmentDataHelper.GetViewModel();
        }