For registration form in asp.net

Hi
i want to create a registration form
i am using visual studio 2005 and sql server 2005
and i written this code
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.Sql;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
     public string GetConnectionString()

    {

        //sets the connection string from your web config file "ConnString" is the name of your Connection String

        return System.Configuration.ConfigurationManager.ConnectionStrings["MyConsString"].ConnectionString;

    ...