WPF利用多线程的后台线程

最近学了一下WPF的后台线程，在这里简单的把代码贴出来，具体的使用已经在程序里面注释了。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
//多线程需要添加的命名空间
using System.ComponentModel;
using System.Threading;

namespace 多线程测试
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        private BackgroundWorker bgWorker = new BackgroundWorker();
        private int i = 0;

        public MainWindow()
        {
            InitializeComponent();
            //支持报告进度更新
            bgWorker.WorkerReportsProgress = true;
            //支持异步取消
            bgWorker.WorkerSupportsCancellation = true;
            //将DoWork_Handler绑定在RunWorkerAsync()
            bgWorker.DoWork += DoWork_Handler;
            //将ProgressChanged_Handler绑定在ReportProgress()
            bgWorker.ProgressChanged += ProgressChanged_Handler; 
            //退出时发生
            bgWorker.RunWorkerCompleted += RunWorkerCompleted_Handler;
        }

        /// 

        /// 开始按钮
        /// 
        /// 
        /// 
        private void btnProcess_Click(object sender, RoutedEventArgs e)
        {
            if (!bgWorker.IsBusy)
            {
                bgWorker.RunWorkerAsync();
            }
        }

        /// 

        /// 取消按钮
        /// 
        /// 
        /// 
        private void btnCancel_Click(object sender, RoutedEventArgs e)
        {
            bgWorker.CancelAsync();
        }

        /// 

        /// 进度更新
        /// 
        /// 
        /// 
        private void ProgressChanged_Handler(object sender, ProgressChangedEventArgs args)
        {
            lbDisplay.Items.Add("第" + i + "次测试");
        }

        /// 

        /// 后台线程
        /// 
        /// 
        /// 
        private void DoWork_Handler(object sender, DoWorkEventArgs args)
        {
            BackgroundWorker worker = sender as BackgroundWorker;
            while (true)
            {
                if (worker.CancellationPending)
                {
                    args.Cancel = true;
                    break;
                }
                else
                {
                    i++;
                    bgWorker.ReportProgress(0);
                    Thread.Sleep(500);
                }
            }
        }

        /// 

        /// 执行完成或正常退出后的事件
        /// 
        /// 
        /// 
        private void RunWorkerCompleted_Handler(object sender, RunWorkerCompletedEventArgs args)
        {
            if (args.Cancelled)
            {
                MessageBox.Show("后台任务已经被取消。", "消息");
            }
            else
            {
                MessageBox.Show("后台任务正常结束。", "消息");
            }
        }
    }
}