Remove Null Items From The Dropdownlist

protected void Button1_Click(object sender, EventArgs e)

{

     for (int i = 0; i < DropDownList1.Items.Count; i++)

     {

                //Here It Will Check Fro the Empty value...

                if (DropDownList1.Items[i].Value == "")

                {

                    //If Found Then Remove That Value From The DropdownList...

                    DropDownList1.Items.Remove();

      }

}

        }