How do I add a "Select item" to a drop down list that has been filled using LINQ to SQL?

var theStates = from states in db.States
                                select new
                                {
                                    StateID = states.StateID,
                                    StateName = states.StateName
                                };

dropPrimaryAddressState.DataSource = theStates;
dropPrimaryAddressState.DataTextField = "StateName";
dropPrimaryAddressState.DataValueField = "StateID";
dropPrimaryAddressState.DataBind();

ListItem newItem = new ListItem();
newItem.Text = "Select a State";
newItem.Value = "XX";

dropPrimaryAddressState.Items.Insert(0, newItem);

dropPrimaryAddressState.SelectedIndex = 0;