DELAY COM THREAD NO C#

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

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

        private void button1_Click(object sender, EventArgs e)
        {
            int miliseg = 1000;

            Thread.Sleep(miliseg);

            MessageBox.Show("Já se passaram 1 segundo", "Aviso!");
        }
    }
}