What to use for me to acquire two data from the database and assign variables for them?

 string myConn = "Server=localhost; user id = root; database = a_project";
//Eventhough my program runs with no errors when I use this string as query, but I can't use both attributes on the query (dBuildings, dID).
//string dQuery = "select building as dBuildings, id as dId from buildings order by building";
            string dQuery = "select building as dBuildings from buildings order by building";

            MySqlConnection dConnect = new MySqlConnection(myConn);
            MySqlCommand dCommand = new MySqlCommand(dQuery, dConnect);
            MySqlDataReader dReader;
            try
            {
                dConnect.Open();
                dReader = dCommand.ExecuteReader();
                while (dReader.Read())
                {
                    string dBuilding = dReader.GetString("dBuildings");
                    comboBox1.Items.Add(dBuilding);
                }
                dConnect.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }