c# - Fill generic list from SqlDataReader

Question

How can I add values that a SqlDataReader returns to a generic List? I have a method where I use SqlDataReader to get CategoryID from a

Answer 1

        List s = new List();
        conn.Open();
        SqlCommand command2 = conn.CreateCommand();
        command2.CommandText = ("select turn from Vehicle where Pagged='YES'");
        command2.CommandType = CommandType.Text;
        SqlDataReader reader4 = command2.ExecuteReader();
        while (reader4.Read())
        {
            s.Add(Convert.ToInt32((reader4["turn"]).ToString()));
        }
        conn.Close();