Show modal popup from code

Question

I have a drop down list

in code, I have this function

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { /////// } 

now I want to show a modal popup when a specific text is selected from a drop-down list from this function

Answer 1

 if(DropDownList1.SelectedItem.Text.Equals("Some Text")) { ModalPopupExtender1.Show(); }