使用“纯”xaml布局，是否可以告诉容器不要调整其子项的大小？

I have a XAML control that's very wide. It affects the size of it's parent, thus changing layout I don't want it to change. I don't mind if the control will be clipped, or whatever - but I want the following:I have a XAML control that's very wide. It affe