how to overlap text in textbox with image that saving to folder andpath in database

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ASP.NET

C#5.0

hi all,
i have completed code to overlap images but what i want is with these overlapped image text in textbox should also overlap on image so below is my code where we have to implement it i cant understand so any body helpme or give my any examples

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Data;
using System.Data.SqlClient;



public partial class upload_site : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {

        string CS = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
        SqlConnection con = new SqlConnection(CS);

        SqlCommand cmd = new SqlCommand();
        string impath = TextBox2.Text+".png";
      // string ip = @"~\Upload\" + TextBox2.Text.Trim();
        string filename = FileUpload1.FileName;
        string pc = @"~\Upload\" + filename.Trim();
        FileUpload1.PostedFile.SaveAs(Server.MapPath(@"~\Upload\" + filename.Trim()));

        cmd = new SqlCommand("insert into imagepath(ID,ImageName,CurrentDate,OldImagePath,newimagepath)values('" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "','" + pc + "','"+impath+"')", con);
        cmd.CommandType = CommandType.Text;
        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
        lblStatus.Text = " Uploaded Successfully ";
        ChangeBackground(filename, pc);





    }
    private void ChangeBackground(string filename, string pc)
    {
        //string CS = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
        System.Drawing.Image imageBackground = System.Drawing.Image.FromFile(@"C:\temp\images.jpg");
        System.Drawing.Image imageOverlay = System.Drawing.Image.FromFile(@"C:\Users\admin\Documents\Visual Studio 2012\WebSites\uploadsite\Upload\" + filename.Trim() + "");
      
       // System.Drawing.Image imageOverlay = System.Drawing.Image.FromFile(@"~\Upload\" + filename.Trim() + "");

        System.Drawing.Image img = new Bitmap(imageBackground.Width, imageBackground.Height);
        using (Graphics gr = Graphics.FromImage(img))
        {
            gr.DrawImage(imageBackground, new Point(0, 0));
            gr.DrawImage(imageOverlay, new Point(0, 0));
        }
        //    img.Save(@"~\Upload\output.png", ImageFormat.Png);
        img.Save(@"C:\Users\admin\Documents\Visual Studio 2012\WebSites\uploadsite\Upload\" + TextBox2.Text + ".png", ImageFormat.Png);
        //img.Save(Server.MapPath(@"~\Upload\"+ ImageFormat.Png));
        img.Save(@"C:\temp\" + TextBox2.Text + ".jpeg", ImageFormat.Jpeg);
        //string impath = @"C:\Users\admin\Documents\Visual Studio 2012\WebSites\uploadsite\Upload\" + TextBox2.Text + ".png";

       // string ip = @"~\Upload\" + TextBox2.Text.Trim();
       //using (SqlConnection con = new SqlConnection(CS))
       // {
       //    FileUpload1.PostedFile.SaveAs(Server.MapPath(@"~\Upload\" + TextBox2.Text.Trim()));
       //     SqlCommand cmd = new SqlCommand("update imagepath set newimagepath= '"+TextBox2.Text+"'.png", con);

       //     cmd.CommandType = CommandType.Text;
       //     con.Open();
       //     cmd.ExecuteNonQuery();
       //     con.Close();
            Label6.Text = "scucess";
        //}
    }

    protected void Button2_Click(object sender, EventArgs e)
    {
        Response.Redirect("separate.aspx");
    }
}