First ever overloaded function

using MySql.Data.MySqlClient;
using System.Data;

public class MySqlContext : IDisposable
{
    private MySqlConnection conn;

    private string serverAddress = "127.0.0.1";
    private string database = "dbtest";
    private string user = "root";
    private string password = "root";

    public MySqlContext()
    {
        string strConnection = String.Format("Data Source={0}; Initial Catalog={1}; User ID={2}; Password={3};", serverAddress, database, user, password);

        conn = new MySqlConnection(strConnection);
    }

    public MySqlDataReader GetReader(string sql, List<MySqlParameter> args)
    {
        if ((args == null) || (args.Count == 0))
        {
            return GetReader(sql);
        }
        else
        {
            return GetReader(sql, args.ToArray());
        }
    }

    public MySqlDataReader GetReader(string sql, MySqlParameter[] args = null)
    {
        MySqlCommand cmd = new MySqlCommand(sql, conn);
        cmd.CommandType = System.Data.CommandType.Text;

        if (conn.State == ConnectionState.Close)
        {
            conn.Open();
        }

        if (args != null)
        {
            cmd.Parameters.AddRange(args);
        }

        MySqlDataReader dr = cmd.ExecuteReader();

        return dr;
    }

    public void Dispose()
    {
        conn.Close();
        conn.Dispose();
    }
}