Hi i try to add a new row on top in my wingrid but i have problem. this is my code:

                    BindingList<MyObject> lis = new BindingList< MyObject >();

                    grid_Test.DataSource = lis;

                    grid_Test.DataBind();

        private void button1_New_Click(object sender, EventArgs e)

        {

            tab_Test.Focus(); 

            grid_Test.Focus();

            grid_Test.DisplayLayout.Bands[0].AddNew();

        }

and i have this error : " Row insertion not supported by this data source. " 

THANKS