WPF将网格行设置为使用绑定的动态XAML对象。

I want have the content of a Grid's row (not DataGrid) bound to a given DataContext property. In others words, I want that the UserControl that appear in, lets say... row 0 of my Grid, change when the DataContext property XX change from an UserControl to another UserControl. Any idea how do that?I want have the content of a Grid's row (not Da