Sitecore Password-Confirmation validator

gistfile1.cs

using Sitecore.Form.Core.Validators;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Sitecore.Form.Core.Client.Validators
{
  public class PasswordConfimationValidator : FormCustomValidator
  {
    protected override bool OnServerValidate(string value)
    {
      Control control = this.FindControl(this.classAtributes["confirmationControlId"]);
      if (control != null)
        return ((TextBox) control).Text == value;
      else
        return false;
    }
  }
}