<ListBox x:Name="MainList" HorizontalAlignment="Left" Height="468" Margin="10,10,0,0" VerticalAlignment="Top" Width="100" ItemsSource="{Binding Items,Mode=TwoWay}" DisplayMemberPath="Name"/>



[Serializable()]
public class MYcontainer : INotifyPropertyChanged,ISerializable
{
    private List<MYClass> _items = new List<MYClass>();
    public List<MYClass> Items
    {
        get{ return _items;}
       set { this._items =value;
        OnPropertyChanged("Items");
    }
public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(string propertyName = null)
    {
        var eventHandler = this.PropertyChanged;
        if (eventHandler != null)
            eventHandler(this, new PropertyChangedEventArgs(propertyName));
    }  
}

when i add an item to "Items" the UI doesnt update, the binding is working fine, since if i closed the window and opened it again, the new items appear correctly what am i doing wrong? i know if i used observablecollection it will work fine, but shouldn't it work with List<>? , i already have in another window a string[] property and it update fine