C# รบกวนแก้โปรแกรมสุ่มตัวเลข ให้กดปุ่มแล้วเริ่มสุ่มและกดหยุดได้

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }


        private void button1_Click(object sender, EventArgs e)
        {
            Random rand = new Random();
            label1.Text = rand.Next(0,10).ToString();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Random rand = new Random();
            label2.Text = rand.Next(0, 10).ToString();

        }

        private void label3_Click(object sender, EventArgs e)
        {

        }
    }
}