<%@ Page Language="c#" Debug="true" %>
<script runat="server">
private void Page_Load(object sender, System.EventArgs e)
{
  string chars = "ABCDEFGHIJKLMNOPRSTUVYZX0123456789";
  int i;
  string r = "";
  Random rnd = new Random(DateTime.Now.Millisecond);
  for (int j = 1; j<=10; j++)
  {
    i = Convert.ToInt32( rnd.Next(0,33) );
    r += chars.Substring(i,1);
  }
  Response.Write("Codice : " + r);
}
</script>