MyContentPage.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Xamarin.Forms;

namespace ListViewDemoVS
{
    class MyContentPage : ContentPage
    {
        public MyContentPage()
        {
            Padding = new Thickness(0, Device.OnPlatform(20, 0, 0), 0, 0);

            ListView listView = new ListView()
            {
                ItemTemplate = new DataTemplate(typeof(ListItemCell)),
                BackgroundColor = Color.Black,
                HasUnevenRows = true,
                IsPullToRefreshEnabled = true,
                ItemsSource = new ListItem[]
                {
                    new ListItem { Title = "First", Description = "1st" },
                    new ListItem { Title = "Second", Description = "2nd" },
                    new ListItem { Title = "Third", Description = "3rd" },
                    new ListItem { Title = "Fourth", Description = "4th" },
                    new ListItem { Title = "Fifth", Description = "5th" },
                    new ListItem { Title = "Sixth", Description = "6th" },
                    new ListItem { Title = "Seventh", Description = "7th" },
                    new ListItem { Title = "Eighth", Description = "8th" },
                    new ListItem { Title = "Ninth", Description = "9th" },
                    new ListItem { Title = "Tenth", Description = "10th" },
                    new ListItem { Title = "Eleventh", Description = "11th" },
                    new ListItem { Title = "Twelfth", Description = "12th" },
                    new ListItem { Title = "Thirteenth", Description = "13th" },
                    new ListItem { Title = "Fourteenth", Description = "14th" },
                    new ListItem { Title = "Fifteenth", Description = "15th" },
                    new ListItem { Title = "Sixteenth", Description = "16th" },
                    new ListItem { Title = "Seventeenth", Description = "17th" },
                    new ListItem { Title = "Eighteenth", Description = "18th" },
                }
            };

            this.Content = listView;
        }
    }
}