Find value of Usercontrol of control in aspx page side

 -----------------------usercontrol-------------------------
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserControl1.ascx.cs" Inherits="Customvalidation_UserControl1" %>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

------------------------aspx pages------------------------

<form id="form1" runat="server">
    <div>
   
        <Test:TestControl ID="TestControl" runat="server" />
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    </div>
    </form>
------------------------aspx.cs side pages------------------------

 UserControl UC_text1 = (UserControl)Page.FindControl("TestControl");
        TextBox text1 = (TextBox)UC_text1.FindControl("TextBox1");
         TextBox text2 = (TextBox)UC_text1.FindControl("TextBox2");
        Response.Write(text1.Text+ "<br/>"+text2.Text);