Gallery in Mono For Android

Main.axml:

<?xml version="1.0" encoding="utf-8"?>
<Gallery xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/gallery"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
/>

Activity.cs:

 public class Activity1 : Activity
    {
        int count = 1;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);

            // Get our button from the layout resource,
            // and attach an event to it
            Gallery gallery = (Gallery)FindViewById<Gallery>(Resource.Id.gallery);

            gallery.Adapter = new ImageAdapter(this);

            gallery.ItemClick += delegate(object sender, Android.Widget.AdapterView.ItemClickEventArgs args)
            {
                Toast.MakeText(this, args.Position.ToString(), ToastLength.Short).Show();
            };
        }
    }

ImageAdapter.cs:
public class ImageAdapter : BaseAdapter
    {
        Context context;

        public ImageAdapter(Context c)
        {
            context = c;
        }

        public override int Count { get { return thumbIds.Length; } }

        public override Java.Lang.Object GetItem(int position)
        {
            return null;
        }

        public override long GetItemId(int position)
        {
            return 0;
        }

        // create a new ImageView for each item referenced by the Adapter
        public override View GetView(int position, View convertView, ViewGroup parent)
        {
            ImageView i = new ImageView(context);

            i.SetImageResource(thumbIds[position]);
            i.LayoutParameters = new Gallery.LayoutParams(150, 100);
            i.SetScaleType(ImageView.ScaleType.FitXy);

            return i;
        }

        // references to our images
        int[] thumbIds = {
            Resource.Drawable.sample_1,
            Resource.Drawable.sample_2,
            Resource.Drawable.sample_3,
            Resource.Drawable.sample_4,
            Resource.Drawable.sample_5,
            Resource.Drawable.sample_6,
            Resource.Drawable.sample_7
     };
    }
}