Silverlight Gird,Canvas ,Controls and Layout

The layout system works in a similar way to the way an aspx page is constructed. Since XAML is a markup language that can be viewed to work in a similar way to aspx, this makes it a little easier to visualise when working with it. Simply put, to get started you would need to choose a layout type to put controls on. From what I have read, there are three types of layouts that can be used: Canvas, Grid, StackPanel.
 
http://www.codeproject.com/Articles/132079/Silverlight-Journey-Controls-and-Layout.aspx