将窗体始终定位在最上层

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我们需要定时激活窗体,并把窗体声明为最上方

var timer2 = new DispatcherTimer();
timer2.Interval = TimeSpan.FromSeconds(5);
timer2.Tick += new EventHandler(delegate(Object o, EventArgs a)
{
            this.Topmost = false;
            this.Activate();
            this.Topmost = true;

});
timer2.Start();