We have BindingList, no need to implement the interface INotifyPropertyChanged???

Question

Even though i don't implemnt the interface INotifyPropertyChanged, the grid-objects collection works as well.

When i update object, add object into the collection, the grid refreshed successfully.

BindingList improved in new version? Could you please advise.

public partial class DataInGridDemo : Form
    {
        public DataInGridDemo()
        {
            InitializeComponent();
        }

        BindingList<MyCustomClass> list2;

        private void DataInGridDemo_Load(object sender, EventArgs e)
        {
            list2 = new BindingList<MyCustomClass>() { new MyCustomClass(), new MyCustomClass() };
            this.dataGridView1.DataSource = list2;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            list2[0].X = 88888;
            list2[1].s = "going";
            list2.Add(new MyCustomClass());
            list2[2].s = "aassssssss1213";
        }
    }

    public class MyCustomClass //: INotifyPropertyChanged
    {
        private int x;
        public int X
        {
            get
            {
                return x;
            }
            set
            {
                x = value;
                //if (PropertyChanged != null)
                //    PropertyChanged(this, new PropertyChangedEventArgs("X"));
            }
        }
        public string s { get; set; }

        #region INotifyPropertyChanged Members

        //public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }