Dynamically add textboxs in Windows forms Click Button Catch that text box values

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Linq;

using System.Drawing;

namespace asdf

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

             

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Label label = new Label();

            int count = panel1.Controls.OfType<Label>().ToList().Count;

            label.Location = new Point(10, (25 * count) + 2);

            label.Size = new Size(40, 20);

            label.Name = "label_" + (count + 1);

            label.Text = "label " + (count + 1);

            panel1.Controls.Add(label);

            TextBox textbox = new TextBox();

            count = panel1.Controls.OfType<TextBox>().ToList().Count;

            textbox.Location = new System.Drawing.Point(60, 25 * count);

            textbox.Size = new System.Drawing.Size(80, 20);

            textbox.Name = "textbox_" + (count + 1);

           // textbox.TextChanged += new System.EventHandler(this.TextBox_Changed);

            panel1.Controls.Add(textbox);

            Button button = new Button();

            count = panel1.Controls.OfType<Button>().ToList().Count;

            button.Location = new System.Drawing.Point(150, 25 * count);

            button.Size = new System.Drawing.Size(60, 20);

            button.Name = "button_" + (count + 1);

            button.Text = "Button " + (count + 1);

            button.Click += new System.EventHandler(this.Button_Click);

            panel1.Controls.Add(button);

        }

        private void Button_Click(object sender, EventArgs e)

        {

            Button button = (sender as Button);

            TextBox rc = (TextBox)FindDynamicControlByName("textbox_1");

            if (rc != null)

            {

                MessageBox.Show("hai");

            }

        }

        private Control FindDynamicControlByName(string controlName)

        {

            return Controls.Find(controlName, true).FirstOrDefault();

        }

    }

}