using (MySqlConnection conn = new MySqlConnection("Database=" + dbName + ";Data Source=" + dbHost + ";User Id=" + dbUsername + ";Password=" + dbUserpass))
{
    conn.Open();
    using (MySqlCommand comm = new MySqlCommand("SELECT id FROM ololo", conn))
    using (MySqlDataReader reader = comm.ExecuteReader())
    {
        while(reader.Read())
        {
            System.Console.WriteLine("Profit: " + reader.GetInt32("id"));
        }
    }
}