无边界窗口应用程序比我的屏幕分辨率占用更多的空间

I have created a borderless application in WPF, and it works pretty good. However, when I set the WindowState to full screen, the application takes up more space than my screen resolution, so there are some pixels outside the screen in all directions! (looks like some hard coded negative margins are added to hide the default border)I have created a borderless application in WPF,