How to insert "--Select--" in combobox

Question

Hello All,

i am filling country list to Combobox.
This list comes from Database.

now I want to Insert "--Select--" at the top of combox.

i tried cmbcountry.items.insert(0,"--Select--");

but it fired exception that items collections can not be modified after datasource property is set.

Can anyone help me to sort out this problem

Thank in advance

Azamat