title: Xamarin Fragments with `NavigationView` no responding
body: <p>I am new in Xamarin.Android<code>development. 
  I am trying to use</code>Fragments<code>with</code>NavigationView` but i have a problem 
  when i clicking on item in navigationView i dont see any response (menu close automaticly &amp; i dont see click effect) </p>
  
  <p>Drawer Navigation Configuried in <code>MainActivity</code></p>
  
  <p>Main.axml</p>
  
  <pre><code>  &lt;android.support.v4.widget.DrawerLayout
          android:id="@+id/drawer_layout"
          android:layout_height="match_parent"
          android:fitsSystemWindows="true"
          android:layout_width="match_parent"&gt;
  
  
          &lt;RelativeLayout
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent" /&gt;
          &lt;android.support.design.widget.NavigationView
              android:id="@+id/nav_view"
              android:layout_height="match_parent"
              android:layout_width="200dp"
              android:layout_gravity="right"
              android:fitsSystemWindows="true"
              app:menu="@menu/menu"       
              /&gt;
  
      &lt;/android.support.v4.widget.DrawerLayout&gt;
  
    &lt;FrameLayout
              android:id="@+id/sample_content_fragment"
              android:layout_weight="2"
              android:layout_width="match_parent"
              android:layout_height="0px" /&gt;
  </code></pre>
  
  <p>i tried to investigate this issue and<br>
  i thinking that something with menu items (null)
  I attached a image <a href="https://i.stack.imgur.com/Fx8UO.jpg" rel="nofollow noreferrer">here</a> </p>