protected void registrar_Click(object sender, EventArgs e)
        {
            string url = string.Empty;
            url = string.Format("{0}?IdCliente{1}","{0}?NombreCompleto{2}","{0}?Direccion{3}","{0}?Email{4}","{0}?Telefono{5}",
                                 "AgregarCliente.aspx",
                                 this.MiCliente.ObtenerDatosCliente());
            Response.Redirect(url);

        }