将复选框列表绑定到通用列表

如何将CheckBoxList绑定到泛型列表对象。下面的示例代码可以满足以下目的:

protected void Page_Load(object sender, EventArgs e)
{
    // Works well with the datatable as a data source
    //DataTable _entityList = new DataTable();
    //_entityList.Columns.Add("Id", typeof(int));
    //_entityList.Columns.Add("ProductName", typeof(string));
    //_entityList.Rows.Add(new object[] { 1, "First" });
    //_entityList.Rows.Add(new object[] { 2, "Second" });
    // Doesn't work with the generic list as a data source
    List<MyProduct> _entityList = new List<MyProduct>();
    _entityList.Add(new MyProduct(1, "First"));
    _entityList.Add(new MyProduct(2, "Second"));
    cblProducts.DataSource = _entityList;
    cblProducts.DataTextField = "ProductName";
    cblProducts.DataValueField = "Id";
    cblProducts.DataBind();
}
public class MyProduct
{
    public int Id;
    public string ProductName;
    public bool selected;
    public MyProduct(int id, string desc, bool slctd)
    {
        this.Id = id;
        this.ProductName = desc;
        this.selected = slctd;
    }
    public MyProduct()
    {
        // TODO: Complete member initialization
    }
}

但是它抛出了一个运行时异常:

数据绑定:"测试。MyProduct'不包含名为'ProductName'的属性。

我错过了什么?

public class MyProduct
{
   public int Id { get; set; }
   public string ProductName { get; set; }
   public bool selected { get; set; }
   ...
}