/// <summary>
/// Show the information to the user in the given form.
/// </summary>
public void ShowDataInForm(DisplayForm frm, ADODB.Recordset data)
{
  frm.UserFirstNameLbl.Text = data.Fields[0].ToString();
  frm.UserLastNameLbl.Text = data.Fields[0].ToString();
  frm.Show();
}

/// <summary>
/// This class will retrieve a string from the database and
/// display it on the screen.
/// </summary>
public class ShowDatabaseInfoAbstracted
{
  /// <summary>
  /// Main driver method
  /// </summary>
  public void GetAndShowData(int recordId)
  {
    ADODB.Recordset data = GetData();
    DisplayFormAbstracted frm = GetForm();
    ShowDataInForm(frm, data);
  }
  /// <summary>
  /// Open an ADO connection to Microsoft SQL Server,
  /// get the data, and return it.
  /// </summary>
  public ADODB.Recordset GetData()
  {
    var connection = new ADODB.Connection();
    connection.ConnectionString = "my connection string";
    connection.Open();
    var rs = new ADODB.Recordset();
    //The following query is specific to Microsoft SQL Server.
    //It will not execute properly on Oracle.
    rs.Open("Microsoft SQL Specific Query", connection);
    rs.ActiveConnection = null;
    return rs;
  }
  /// <summary>
  /// Get the proper form to use for our display.
  /// </summary>
  private DisplayFormAbstracted GetForm()
  {
    return new DisplayFormAbstracted();
  }
  /// <summary>
  /// Show the information to the user in the given form.
  /// </summary>
  public void ShowDataInForm(DisplayFormAbstracted frm, ADODB.Recordset data)
  {
    frm.UserFirstName = data.Fields[0].ToString();
    frm.UserLastName = data.Fields[0].ToString();
    frm.Show();
  }
}
/// <summary>
/// Form that displays the information to the user.
/// </summary>
public class DisplayFormAbstracted : Form
{
  /// <summary>
  /// This is private so it cannot be used by an outside
  /// consumer, thus improving the abstraction.
  /// </summary>
  private Label _userFirstNameLbl;
  private Label _userLastNameLbl;
  /// <summary>
  /// These getters and setters can change as the
  /// display requirements change, but the calling
  /// code will be unaffected.
  /// </summary>
  public string UserFirstName
  {
    get { return _userFirstNameLbl.Text; }
    set { _userFirstNameLbl.Text = value; }
  }
  /// <summary>
  /// These getters and setters can change as the
  /// display requirements change, but the calling
  /// code will be unaffected.
  /// </summary>
  public string UserLastName
  {
    get { return _userLastNameLbl.Text; }
    set { _userLastNameLbl.Text = value; }
  }
  /// <summary>
  /// Constructor that creates the data display form.
  /// </summary>
  public DisplayFormAbstracted()
  {
    _userFirstNameLbl = new Label();
    Controls.Add(_userFirstNameLbl);
    _userLastNameLbl = new Label();
    Controls.Add(_userLastNameLbl);
  }
}