RememberListActivity.cs

using Android.App;
using Android.OS;
using Android.Support.V7.App;
using Android.Support.V7.Widget;

namespace RememberIt
{
    [Activity(Label = "Things to remember")]
    public class RememberListActivity : AppCompatActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            SetContentView(Resource.Layout.RememberList);

            // Setup the toolbar
            Toolbar myToolbar = (Toolbar)FindViewById(Resource.Id.my_toolbar);
            SetSupportActionBar(myToolbar);
        }

        public override bool OnOptionsItemSelected(Android.Views.IMenuItem item)
        {
            switch (item.ItemId)
            {
                case Resource.Id.action_add:
                    return true;
                default:
                    return base.OnOptionsItemSelected(item);
            }
        }

        public override bool OnCreateOptionsMenu(Android.Views.IMenu menu)
        {
            MenuInflater.Inflate(Resource.Menu.MainMenu, menu);
            return base.OnCreateOptionsMenu(menu);
        }
    }
}