UltraDropDown

private void FruitInit()

     {

    //Create some fruit

    fruits.Add(-1,"apple");

            fruits.Add(-2,"banana");

            //Create and add to the ultraDropDown

            UltraDropDown fruitUltraDropDown = new UltraDropDown();

            fruitUltraDropDown.DataSource = fruits.ToList();

            fruitUltraDropDown.DisplayMember = "Value";

            fruitUltraDropDown.ValueMember = "Key";

            MyUltraGrid.DisplayLayout.Bands[0].Columns["MyColumn"].ValueList = fruitUltraDropDown;

        }