Creating Bindable Objects (Having a DataGridView Show a List of Your Custom Objects)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
//How to: Implement the INotifyPropertyChanged Interface
//http://msdn.microsoft.com/en-us/library/ms229614.aspx
 
namespace HDI_Winforms_BindableObjects
{
    public partial class Form1 : Form
    {
        BindingList<OrderData> ProductList = new BindingList<OrderData>();
        public Form1()
        {
            InitializeComponent();
            LoadData();
        }
 
        private void LoadData()
        {
            ProductList.Add(new OrderData("Apples", 1, null, null));
            ProductList.Add(new OrderData("Oranges", 2, null, null));
            ProductList.Add(new OrderData("Bananas", 3, null, null));
            ProductList.Add(new OrderData("Pears", 4, null, null));
            this.DataGridView1.DataSource = ProductList;
        }
 
    }
 
    public class OrderData : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
 
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }
        private string _ItemName;
        public string ItemName
        {
            get { return _ItemName; }
            set
            {
                _ItemName = value;
            }
        }
        private decimal _UnitPrice;
        public decimal UnitPrice
        {
            get { return _UnitPrice; }
            set
            {
                _UnitPrice = value;
            }
        }
 
        private int? _Quantity;
        public int? Quantity
        {
            get { return _Quantity; }
            set
            {
                _Quantity = value;
                    NotifyPropertyChanged("Quantiy");
                    NotifyPropertyChanged("ExtPrice");
            }
        }
        private DateTime? _OrderDate;
        public DateTime? OrderDate
        {
            get { return _OrderDate; }
            set
            {
                _OrderDate = value;
                   NotifyPropertyChanged("OrderDate");
                   NotifyPropertyChanged("ShipDate");
            }
        }
        public DateTime? ShipDate
        {
            get { return _OrderDate + new TimeSpan(30, 0, 0, 0); }
        }
 
 
        public decimal? ExtPrice
        {
            get { return _Quantity * _UnitPrice; }
        }
        public OrderData(string ItmName, decimal PriceEach, int? Qty, DateTime? OrdDate)
        {
            _ItemName = ItmName;
            _UnitPrice = PriceEach;
            _Quantity = Qty;
            _OrderDate = OrdDate;
        }
    }
}