C# 使用接口做到界面与后台操作分层

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

namespace CallBackDemo
{
    public partial class Form1 : Form,ICallBack
    {
        Device dev=new Device();
        public Form1()
        {
            InitializeComponent();
            dev.Start();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dev.Query(this);
        }

        public void Process(int i)
        {
            MessageBox.Show(i.ToString());
        }
    }

   public interface ICallBack
    {
        void Process(int i);
    }

    public class Device
    {
        public void Start()
        {
           
            Thread thread=new Thread(proc);
            thread.IsBackground = true;
            thread.Start();
        }

        private ICallBack callBack;

        public void Query(ICallBack callBack)
        {
            this.callBack = callBack;
            query = 1;
        }

        private int query = 0;
        public void proc()
        {
            while (true)
            {
                Thread.Sleep(1000);
                if (query == 1)
                {
                    if (callBack != null)
                    {
                        callBack.Process(100);
                    }
                    query = 0;
                }
            }
        }
    }
}