C# 批量添加控件

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 WindowsFormsApp7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            Gen_butttons();
        }
        void Gen_butttons()
        {
            int x, y;
            
            for(int i=0;i<12;i++)
            {
                x = i %3;
                y = i /3;
                Button btn = new Button();
                btn.Name = "btn" + (i + 1).ToString();
                btn.Text = (i + 1).ToString();
                btn.Size = new Size(60, 60);
                btn.Location = new Point(60 + 65 * x, 60 + 65 * y);
                btn.Click += btn_Click;
                this.Controls.Add(btn);
            }
        }
        private void btn_Click(object  sendr,EventArgs e)
        {
            Button btn = (Button)sendr;
            MessageBox.Show(btn.Text);
        }
    }
 
}