Delete Dynamic Control (textbox And Button)

this is my code and i want to know how i add some code to delete dynamic control(textbox and button) when user click delete button.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Globalization;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
CreateTextBox();
}
else
{
Session["arrayTextBox"] = null;
Session["arrayButton"] = null;
}
}
protected void CreateTextBox()
{
List<TextBox> arrayTextBox = new List<TextBox>();
List<Button> arrayButton = new List<Button>();
if (TextBox1.Text != "")............................