winform 程序 窗体有个标签 开个线程去执行一个复杂的计算 当计算完事，改变标签的文本内容 我的代码如下 但是貌似最好这样写  
那天有人问我，线程通信的事  ... 我在想这里怎么应用
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace ThreadDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;//这样做是不是也不好
            lblMessage.Text = "处理复杂计算...";
        }
        private void btnOperater_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(Cal);
            thread.IsBackground = true;
            thread.Start();
        }
        private void Cal()
        {
            for (int i = 0; i <= 100000; i++)
            {
                txtResult.Text = i.ToString();
            }
            lblMessage.Text = "计算完毕";//这句是不是不应该放这里
        }
    }
}