Creating a gift card payment provider [Legacy]

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ConfigurePayment.ascx.cs"
	Inherits="GiftCardPaymentProvider.ConfigurePayment" %>
	<div id="DataForm">
          <table cellpadding="0" cellspacing="2"> 
	    <tr>
	      <td class="FormLabelCell" colspan="2"><b>Configure Gift Card</b></td>
	    </tr>
          </table>
	  <br />
	  <table class="DataForm">
	    <tr>
	      <td class="FormLabelCell"><asp:Literal ID="Literal4" runat="server" Text="MetaClass name" />:</td>
	      <td class="FormFieldCell">
                <asp:TextBox 
                  Runat="server" 
                  ID="MetaClassName" 
                  Width="230">
                </asp:TextBox>
                <br />
                <asp:RequiredFieldValidator 
                  ControlToValidate="MetaClassName" 
                  Display="dynamic" 
                  Font-Name="verdana" 
                  Font-Size="9pt" 
                  ErrorMessage="'MetaClass name' must not be left blank."
                  runat="server" 
                  id="RequiredFieldValidator2">
                </asp:RequiredFieldValidator>
              </td>
            </tr>
	  </table>
	</div>

public partial class ConfigurePayment : System.Web.UI.UserControl, IGatewayControl
  {
    string _validationGroup = string.Empty;
    private PaymentMethodDto _paymentMethodDto = null;
    private const string _metaClassParameterName = "GiftCardMetaClass";

    /// <summary>
    /// Handles the Load event of the Page control.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
    protected void Page_Load(object sender, System.EventArgs e)
      {
        BindData();
      }

    /// <summary>
    /// Binds a data source to the invoked server control and all its child controls.
    /// </summary>
    public override void DataBind()
      {
        BindData();
        base.DataBind();
      }

    /// <summary>
    /// Binds the data.
    /// </summary>
    public void BindData()
      {
        // fill in the form fields
        if (_paymentMethodDto != null && _paymentMethodDto.PaymentMethodParameter != null)
          {
            var param = GetParameterByName(_metaClassParameterName);
            if (param != null)
              {
                MetaClassName.Text = param.Value;
              }
          }
        else
          {
            this.Visible = false;
          }
      }

    /// <summary>
    /// Saves the object changes.
    /// </summary>
    /// <param name="dto">The dto.</param>
    public void SaveChanges(object dto)
      {
        if (this.Visible)
          {
            _paymentMethodDto = dto as PaymentMethodDto;
            if (_paymentMethodDto != null && _paymentMethodDto.PaymentMethodParameter != null)
              {
                var paymentMethodId = Guid.Empty;
                if (_paymentMethodDto.PaymentMethod.Count > 0)
                  {
                    paymentMethodId = _paymentMethodDto.PaymentMethod[0].PaymentMethodId;
                  }

                var param = GetParameterByName(_metaClassParameterName);
                if (param != null)
                  {
                    param.Value = MetaClassName.Text;
                  }
                else
                  {
                    CreateParameter(_paymentMethodDto, _metaClassParameterName, MetaClassName.Text, paymentMethodId);
                  }
              }
          }
      }

    /// <summary>
    /// Gets the name of the parameter by.
    /// </summary>
    /// <param name="name">The name.</param>
    private PaymentMethodDto.PaymentMethodParameterRow GetParameterByName(string name)
      {
        var rows = (PaymentMethodDto.PaymentMethodParameterRow[])_paymentMethodDto.PaymentMethodParameter.Select(String.Format("Parameter = '{0}'", name));
        if (rows != null && rows.Length > 0)
          {
            return rows[0];
          }
        else 
          {
            return null;
          }
      }

    /// <summary>
    /// Creates the parameter.
    /// </summary>
    /// <param name="dto">The dto.</param>
    /// <param name="name">The name.</param>
    /// <param name="value">The value.</param>
    /// <param name="paymentMethodId">The payment method id.</param>
    private void CreateParameter(PaymentMethodDto dto,
        string name, string value, Guid paymentMethodId)
      {
        var newRow = dto.PaymentMethodParameter.NewPaymentMethodParameterRow();
        newRow.PaymentMethodId = paymentMethodId;
        newRow.Parameter = name;
        newRow.Value = value;
        // add the row to the dtoif (newRow.RowState == DataRowState.Detached)
        dto.PaymentMethodParameter.Rows.Add(newRow);
      }

    /// <summary>
    /// Loads the object.
    /// </summary>
    /// <param name="dto">The dto.</param>
    public void LoadObject(object dto)
      {
        _paymentMethodDto = dto as PaymentMethodDto;
      }

    /// <summary>
    /// Gets or sets the validation group.
    /// </summary>
    public string ValidationGroup
      {
        get
          {
            return _validationGroup;
          }
        set
          {
            _validationGroup = value;
          }
      }
  }