ListItem.cs

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

namespace Update.View
{
    public class ListItem : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public bool IsSelected { get; set; }

        public object Item { get; set; }
    }
}