异步

方法一
using System.Threading

Thread thread = new Thread(new ParameterizedThreadStart(DoWork));
                thread.Start(obsFiles);

方法二
System.Threading.Tasks.Task oTask = System.Threading.Tasks.Task.Factory.StartNew(() =>
                    {
                        try
                        {
                            System.Windows.MessageBox.Show("导入完成");
                        }
                        catch (Exception ex)
                        {
                            System.Windows.MessageBox.Show("导入出错：" + ex.Message);
                        }
                        finally
                        {
                            this.Dispatcher.Invoke(new Action(() =>
                            {
                                spCZ.IsEnabled = true;
                            }));
                        }
                    });

 Application.ExitThread();
                Application.Exit();