WPF:在无边框窗口上的投影，没有自定义的chrome

Im struggling with drop shadow on WPF-windows with WindowStyle=None and ResizeMode=NoResize. Is there any good alternative to using a DropShadow-effect on the window-content? I have tried WindowChrome in Shell Integration Library but its not showing any "Chrome" when ResizeMode=NoResize.Im struggling with drop shadow on WPF-windows w