Button trong lập trình C# Winform

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ButtonGUI
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            LoadButton();
        }

        void LoadButton()
        {
            
        }
        int i = 0;
        void AddButton()
        {
            Button btn = new Button() { Text = i.ToString()};
            Random rand = new Random();
            btn.Location = new Point(rand.Next(0, this.Size.Width), rand.Next(0,this.Size.Height));
            btn.Click += btn_Click;

            this.Controls.Add(btn);

            i++;
        }

        void btn_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            MessageBox.Show(btn.Text);
        }

        private void btnClick_Click(object sender, EventArgs e)
        {
            AddButton();
        }
    }
}
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namespace ButtonGUI
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.btnClick = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // btnClick
            // 
            this.btnClick.AutoSize = true;
            this.btnClick.Location = new System.Drawing.Point(12, 12);
            this.btnClick.Name = "btnClick";
            this.btnClick.Size = new System.Drawing.Size(106, 23);
            this.btnClick.TabIndex = 0;
            this.btnClick.Text = "Click to add button";
            this.btnClick.UseVisualStyleBackColor = true;
            this.btnClick.Click += new System.EventHandler(this.btnClick_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 261);
            this.Controls.Add(this.btnClick);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button btnClick;

    }
}

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