There are three different types of Layout controls provided by Silverlight:
Canvas - Position child elements absolutely in x, y space.
StackPanel - Position child elements relative to one another in horizontal or vertical stacks.
Grid - Position child elements in rows and columns.
You have to add a layout panel to every XAML page you create. All other UI elements must be added inside one of the layout panels. Each page can have exactly one layout panel control.
