Sectioned ListView for Android Using Mono C#

using System;
using System.Collections.Generic;

using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace FoodTypeSectionList
{
    [Activity(Label = "FoodTypeSectionList", MainLauncher = true, Icon = "@drawable/icon")]
    public class Activity1 : Activity
    {
        private List<MeatType> meats;
        private List<VegetableType> vegetables;
        private List<FruitType> fruits;

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

            // Populate our lists
            List<MeatType> meats = new List<MeatType>();
            meats.Add(new MeatType("Hamburger", "Ground chuck beef", 2.76));
            meats.Add(new MeatType("Sirloin", "Sliced sirloin steaks", 4.56));

            List<VegetableType> veggies = new List<VegetableType>();
            veggies.Add(new VegetableType("Brocolli", "Cut brocolli floretes", 1.76));
            veggies.Add(new VegetableType("Carrots", "Cut peeled baby carrots", 2.18));

            List<FruitType> fruits = new List<FruitType>();
            fruits.Add(new FruitType("Apple", "Granny smith apples", 0.87));
            fruits.Add(new FruitType("Peach", "South Carolina peaches", 1.12));

            // Now we create our adapters for the item types
            MeatTypeListAdapter madptr = new MeatTypeListAdapter(this, Resource.Layout.FoodTypeListItem, meats); 
            VegetableTypeListAdapter vadptr = new VegetableTypeListAdapter(this, Resource.Layout.FoodTypeListItem, veggies);
            FruitTypeListAdapter fadptr = new FruitTypeListAdapter(this, Resource.Layout.FoodTypeListItem, fruits);

            // Now we create the sections and the sectioned adapter
            SectionedListAdapter sadptr = new SectionedListAdapter(this);
            sadptr.AddSection("Meats", "Name", "Description", "Price (lb.)", madptr);
            sadptr.AddSection("Vegetables", "Name", "Description", "Price (lb.)", vadptr);
            sadptr.AddSection("Fruits", "Name", "Description", "Price (lb.)", fadptr);

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

            // Fetch our list and populate it
            ListView foodlist = FindViewById<ListView>(Resource.Id.foodlist);
            foodlist.SetAdapter(sadptr);
            foodlist.ItemClick += new EventHandler<AdapterView.ItemClickEventArgs>(foodlist_ItemClick);
        }

        private void foodlist_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
        {
            SectionedListAdapter adapter = (sender as ListView).Adapter as SectionedListAdapter;
            JavaObjectHandler item = adapter.GetItem(e.Position) as JavaObjectHandler;
            if (item != null)
            {
                if (item.Instance is MeatType)
                {
                    Toast.MakeText(this, "You clicked on a meat: " + (item.Instance as MeatType).Name, ToastLength.Short).Show();
                }
                else if (item.Instance is VegetableType)
                {
                    Toast.MakeText(this, "You clicked on a vegetable: " + (item.Instance as VegetableType).Name, ToastLength.Short).Show();
                }
                else if (item.Instance is FruitType)
                {
                    Toast.MakeText(this, "You clicked on a fruit: " + (item.Instance as FruitType).Name, ToastLength.Short).Show();
                }
            }
        }
    }
}