or
private void RadFormTestGridArrayList_Load(object sender, EventArgs e) { bindingList = new BindingList<MyObject>(); bindingList.Add(new MyObject(1, "Object one")); bindingList.Add(new MyObject(2, "Object two")); bindingList.Add(new MyObject(3, "Object three")); radGridView1.DataSource = bindingList; radGridView1.Rows[0].ErrorText = "This row has an error";
radGridView1.Rows[1].ErrorText = "This row has an error";
}