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...
    var navigationView = FindViewById<NavigationView>(Resource.Id.nav_view);
    navigationView.NavigationItemSelected += NavigationView_NavigationItemSelected;
}
		void NavigationView_NavigationItemSelected(object sender, NavigationView.NavigationItemSelectedEventArgs e)
		{
			switch (e.MenuItem.ItemId)
			{
				case (Resource.Id.nav_home):
					Toast.MakeText(this, "selecionando menu Home", ToastLength.Short).Show();

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var drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, Resource.String.open_drawer, Resource.String.close_drawer);
drawerLayout.AddDrawerListener(drawerToggle);
drawerToggle.SyncState();

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<string name="open_drawer">abrir</string>
<string name="close_drawer">fechar</string>

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var toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);

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public class MainActivity : AppCompatActivity

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public class MainActivity : AppCompatActivity

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<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>

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<?xml version="1.0" encoding="UTF-8" ?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <group android:checkableBehavior="single">
    <item
      android:id="@+id/nav_home"
      android:title="Home" />
    <item
      android:id="@+id/nav_xamarin"
      android:title="Xamarin" />
    <item

eduardoguilarducci

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="178dp"
    android:background="?attr/colorPrimary"
    android:orientation="vertical"
    android:weightSum="1">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="56dp"

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<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/drawer_layout"
    android:fitsSystemWindows="true">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">