protected virtual void DrawerSetup(DrawerLayout drawer) { if (drawer == null) { return; } var drawerToggle = new ActionBarDrawerToggle( /*activity:*/ this, /*drawerLayout:*/ drawer, /*toolbar: */ Toolbar, OpenDrawerContentDescRes, CloseDrawerContentDescRes); drawer.AddDrawerListener(drawerToggle); drawer.OnDrawerOpened().Subscribe(OnDrawerOpened).ToBeDisposedBy(this); drawerToggle.SyncState(); drawerToggle.ToBeDisposedBy(this); }