AConnection conn = new SAConnection("Data Source=SQL Anywhere 12 Demo");
conn.Open();
SACommand cmd = new SACommand("SELECT Surname FROM Employees", conn);
SADataReader reader = cmd.ExecuteReader();
listEmployees.BeginUpdate();
while (reader.Read())
{
    listEmployees.Items.Add(reader.GetString(0));
}
listEmployees.EndUpdate();
reader.Close();
conn.Close();