摘要：
C#异步UI更新不会阻止平滑的Tasktask=Task。工厂开始新建（（）=>；｛DoLongRunningWork（）；//耗时操作｝）；TaskUITask=任务。继续（（）=>；｛this.TextBlock1.Text=“完成”；//在操作后分配值｝，TaskScheduler。来自当前同步hr
c# 异步更新UI 不阻塞 流畅
Task task = Task.Factory.StartNew(() =>
{
DoLongRunningWork(); // 耗时运算
});Task UITask= task.ContinueWith(() =>
{
this.TextBlock1.Text = "Complete"; //运算后 赋值
}, TaskScheduler.FromCurrentSynchronizationContext());
btnStop.Invoke(new Action(delegate() { this.btnStop.Enabled = false; }));
btnStart.Invoke(new Action(delegate() { this.btnStart.Enabled = true; }));