This is a hack that needs some help

[A]

Hi Group,

I am trying to find how to insert a blank combo box option in my list of
available choices thus representing no choice. I have a total hack right
now below

DataTable dt = Facility.GetDataTable;

//hack starts

DataRow dr = dt.NewRow();
dr["colA"] = string.Empty;
dr["colB"] = string.Empty;
dt.Rows.InsertAt(dr,0);

cboRef.DataSource = dt;
cboRef.ValueMember = "colA";
cboef.DisplayMember= "colB";
As you can see, I am using data binding and so I am not sure how to insert a
blanck row any other way than throught the data rows collection. This is
causing a crash when I try to set the SelectedItem property later.

Any help?