Connection string in the code

ow I need to call that connection on a code behind the page...

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                BindEmployeesList();
            }
        }

        private void BindEmployeesList()
        {
            string connectionString = ConfigurationManager.ConnectionStrings["NorthwindConnString"].ConnectionString;
            string selectSQL = "SELECT [LastName], [FirstName], [Title], [City], [Email] FROM [Employees]";
            SqlConnection con = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand(selectSQL, con);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();

            adapter.Fill(ds, "Employees");

            gvEmployeesList.DataSource = ds;
            gvEmployeesList.DataBind();
        }

Thanks Dhaker... I needed C#
I found out what to do... here is the code snippet:

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnectionString"].ToString());
                SqlCommand cmd = new SqlCommand("SELECT * FROM someTable", conn);