如何使用WPF创建大小大于其创建大小的用户控件

I've created a user control using WPF and I want to add it to window. I've done that, but I can't make my control have a height higher than the height it has in its own xaml file. My MaxWidth and MaxHeight are both infinity, but I can't make the control any taller than what it is in its xaml file.I've created a user control using WPF and I wan