ListView selected Item binding not work
<p>I have a listview in uwp , and a view model that declare pataient_List and selected_patient in this. my listview show itemsource but I don't know why my listview do not show selected item. </p>

<pre><code> &lt;ListView   ItemsSource="{Binding pataient_List}"
             SelectedItem="{Binding selected_patient, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"&gt;
                    &lt;ListView.ItemTemplate&gt;
                        &lt;DataTemplate&gt;
                            &lt;StackPanel&gt;
                                &lt;TextBlock  Text="{Binding name_to_show_menu, Mode=TwoWay}" /&gt;
                            &lt;/StackPanel&gt;
                        &lt;/DataTemplate&gt;
                    &lt;/ListView.ItemTemplate&gt;
                &lt;/ListView&gt;
</code></pre>

<p>viewmodel is</p>

<pre><code>public class patient_view_model : notify_property_changed_base
    {
        public patient_view_model(patient  patient_param)
        {
            pataient_List = new ObservableCollection&lt;patient&gt;();
            load_patient(); // this function put patients in pataient_List
            selected_patient = patient_param;
        }

 public patient selected_patient
        {
            get { return _selected_patient; }
            set
            {
                if (_selected_patient != value)
                {
                    _selected_patient = value;
                    RasiePropertyChanged();
                }
            }
        }
public ObservableCollection&lt;patient&gt; pataient_List { set; get; }
</code></pre>