title: Keep value at top of drop down list after selection
body: <p>I have a listbox that is getting data from my database, it contains names of continents. I have a dropdown list that populates with countries depending on the name of the continent that was chosen in the list. I want the drop down list to have "Select a country" as the default first value after a choice has been made but it doesn't work.</p>
  
  <p>this is my approach at doing it</p>
  
  <pre><code>protected void lbCont_SelectedIndexChanged(object sender, EventArgs e)
          {
              ListItem liSelectCount = new ListItem("Select a country...", "-1");
              ddlCount.Items.Insert(0, liSelectCount);
          }
  </code></pre>