title: Xamarin forms toolbar items not displaying on view
body: <p>I have a number of view pages that all inherit from ContentPage. The first page that is called
  from the app.cs displays the icon in the toolbar correctly. The second page (TodoItemView) does not display an icon at all (the same code is used). Is there something that I need to do to initialize the toolbar for the second view?</p>
  
  <p>thanks in advance.</p>
  
  <pre><code>This page is called by the following code:
  
        var todoList = new TodoListView();
        return new NavigationPage(todoList);
  
  Th page is called by the following code:
  
        var todoList = new TodoListView();
        return new NavigationPage(todoList);
  
  
  
  
  // Works shows refresh icon
  public class TodoListView : ContentPage
      {
          public TodoListView ()
          {
              Title = "Social Events";
  
              // Display the refresh icon
              var toolbarItem = new ToolbarItem ("Refresh", "refresh.png", ()=&gt;{
              }, 0, 0);
              ToolbarItems.Add (toolbarItem);
  
              var list = new ListView ();
              var viewModel = new TodoListViewModel ();
              list.ItemsSource = viewModel.TodoList;
  
              var cell = new DataTemplate (typeof(AspectImageCell));
              cell.SetBinding (TextCell.TextProperty, "Name");
              cell.SetBinding (TextCell.DetailProperty, "Details");
              cell.SetBinding (ImageCell.ImageSourceProperty, "Image");
              list.ItemTemplate = cell;
              list.ItemTapped += (sender, args) =&gt; {
  
  
                  Navigation.PushAsync (new NavigationPage(new TodoItemView ()));
  
                  // Reset the selected item
                  list.SelectedItem = null;
              };
  
              Content = list;
          }
      }
  
  // Does not work, does not show icon
  public class TodoItemView : ContentPage
      {
          public TodoItemView ()
          {
              Title = "Todo item";
  
              var toolbarItem = new ToolbarItem ("Send", "send.png", ()=&gt;{
  
                  // email todo item
  
              }, 0, 0);
              ToolbarItems.Add (toolbarItem);
           }
  }
  </code></pre>