Xamarin.Forms - Delete from ObservableCollection<T>

gistfile1.cs

using System;

using Xamarin.Forms;
using System.Collections.ObjectModel;

namespace SampleDeleteItem
{
	public class Item
	{
		public string Name { get; set; }
		public string Email { get; set; }
	}

	public class App : Application
	{
		ObservableCollection<Item> Items = new ObservableCollection<Item> ();
		Random r = new Random();

		public App ()
		{
			ListView lv = new ListView ();
			lv.ItemsSource = Items;

			DataTemplate dataTemplate = new DataTemplate (typeof(TextCell));
			dataTemplate.SetBinding (TextCell.TextProperty, "Name");
			dataTemplate.SetBinding (TextCell.DetailProperty, "Email");

			Button addItem = new Button () { Text = "Add Item" };
			Button removeItem = new Button () { Text = "Remove Item" };

			lv.ItemTemplate = dataTemplate;

			addItem.Clicked += (object sender, EventArgs e) => {
				Items.Add(new Item() { Name = "David", Email = "dave@xamarin.com" });
			};

			removeItem.Clicked += (object sender, EventArgs e) => {
				if(Items.Count > 0) {
					Items.RemoveAt(r.Next(0, Items.Count - 1));
				}
			};

			// The root page of your application
			MainPage = new ContentPage {
				Content = new StackLayout {
					VerticalOptions = LayoutOptions.Center,
					Children = {
						addItem,
						removeItem,
						lv
					}
				}
			};
		}

		protected override void OnStart ()
		{
			// Handle when your app starts
		}

		protected override void OnSleep ()
		{
			// Handle when your app sleeps
		}

		protected override void OnResume ()
		{
			// Handle when your app resumes
		}
	}
}